diff --git a/internal/internal.go b/internal/internal.go
index f6b85de84..567b0f773 100644
--- a/internal/internal.go
+++ b/internal/internal.go
@@ -16,6 +16,8 @@ import (
 	"syscall"
 	"time"
 	"unicode"
+
+	"github.com/alecthomas/units"
 )
 
 const alphanum string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
@@ -36,6 +38,11 @@ type Duration struct {
 	Duration time.Duration
 }
 
+// Size just wraps an int64
+type Size struct {
+	Size int64
+}
+
 // SetVersion sets the telegraf agent version
 func SetVersion(v string) error {
 	if version != "" {
@@ -85,6 +92,27 @@ func (d *Duration) UnmarshalTOML(b []byte) error {
 	return nil
 }
 
+func (s *Size) UnmarshalTOML(b []byte) error {
+	var err error
+	b = bytes.Trim(b, `'`)
+
+	val, err := strconv.ParseInt(string(b), 10, 64)
+	if err == nil {
+		s.Size = val
+		return nil
+	}
+	uq, err := strconv.Unquote(string(b))
+	if err != nil {
+		return err
+	}
+	val, err = units.ParseStrictBytes(uq)
+	if err != nil {
+		return err
+	}
+	s.Size = val
+	return nil
+}
+
 // ReadLines reads contents from a file and splits them by new lines.
 // A convenience wrapper to ReadLinesOffsetN(filename, 0, -1).
 func ReadLines(filename string) ([]string, error) {
diff --git a/internal/internal_test.go b/internal/internal_test.go
index 486c3d744..89ee06903 100644
--- a/internal/internal_test.go
+++ b/internal/internal_test.go
@@ -166,6 +166,29 @@ func TestDuration(t *testing.T) {
 	assert.Equal(t, time.Second, d.Duration)
 }
 
+func TestSize(t *testing.T) {
+	var s Size
+
+	s.UnmarshalTOML([]byte(`"1B"`))
+	assert.Equal(t, int64(1), s.Size)
+
+	s = Size{}
+	s.UnmarshalTOML([]byte(`1`))
+	assert.Equal(t, int64(1), s.Size)
+
+	s = Size{}
+	s.UnmarshalTOML([]byte(`'1'`))
+	assert.Equal(t, int64(1), s.Size)
+
+	s = Size{}
+	s.UnmarshalTOML([]byte(`"1GB"`))
+	assert.Equal(t, int64(1000*1000*1000), s.Size)
+
+	s = Size{}
+	s.UnmarshalTOML([]byte(`"12GiB"`))
+	assert.Equal(t, int64(12*1024*1024*1024), s.Size)
+}
+
 func TestCompressWithGzip(t *testing.T) {
 	testData := "the quick brown fox jumps over the lazy dog"
 	inputBuffer := bytes.NewBuffer([]byte(testData))
diff --git a/plugins/inputs/filecount/README.md b/plugins/inputs/filecount/README.md
index ccec532aa..cf11b7d90 100644
--- a/plugins/inputs/filecount/README.md
+++ b/plugins/inputs/filecount/README.md
@@ -19,10 +19,11 @@ Counts files in directories that match certain criteria.
   ## Only count regular files. Defaults to true.
   regular_only = true
 
-  ## Only count files that are at least this size in bytes. If size is
+  ## Only count files that are at least this size. If size is
   ## a negative number, only count files that are smaller than the
-  ## absolute value of size. Defaults to 0.
-  size = 0
+  ## absolute value of size. Acceptable units are B, KiB, MiB, KB, ...
+  ## Without quotes and units, interpreted as size in bytes.
+  size = "0B"
 
   ## Only count files that have not been touched for at least this
   ## duration. If mtime is negative, only count files that have been
diff --git a/plugins/inputs/filecount/filecount.go b/plugins/inputs/filecount/filecount.go
index 66d5a33fe..d613f3b77 100644
--- a/plugins/inputs/filecount/filecount.go
+++ b/plugins/inputs/filecount/filecount.go
@@ -34,10 +34,11 @@ const sampleConfig = `
   ## Only count regular files. Defaults to true.
   regular_only = true
 
-  ## Only count files that are at least this size in bytes. If size is
+  ## Only count files that are at least this size. If size is
   ## a negative number, only count files that are smaller than the
-  ## absolute value of size. Defaults to 0.
-  size = 0
+  ## absolute value of size. Acceptable units are B, KiB, MiB, KB, ...
+  ## Without quotes and units, interpreted as size in bytes.
+  size = "0B"
 
   ## Only count files that have not been touched for at least this
   ## duration. If mtime is negative, only count files that have been
@@ -51,7 +52,7 @@ type FileCount struct {
 	Name        string
 	Recursive   bool
 	RegularOnly bool
-	Size        int64
+	Size        internal.Size
 	MTime       internal.Duration `toml:"mtime"`
 	fileFilters []fileFilterFunc
 }
@@ -99,7 +100,7 @@ func (fc *FileCount) regularOnlyFilter() fileFilterFunc {
 }
 
 func (fc *FileCount) sizeFilter() fileFilterFunc {
-	if fc.Size == 0 {
+	if fc.Size.Size == 0 {
 		return nil
 	}
 
@@ -107,10 +108,10 @@ func (fc *FileCount) sizeFilter() fileFilterFunc {
 		if !f.Mode().IsRegular() {
 			return false, nil
 		}
-		if fc.Size < 0 {
-			return f.Size() < -fc.Size, nil
+		if fc.Size.Size < 0 {
+			return f.Size() < -fc.Size.Size, nil
 		}
-		return f.Size() >= fc.Size, nil
+		return f.Size() >= fc.Size.Size, nil
 	}
 }
 
@@ -257,7 +258,7 @@ func NewFileCount() *FileCount {
 		Name:        "*",
 		Recursive:   true,
 		RegularOnly: true,
-		Size:        0,
+		Size:        internal.Size{Size: 0},
 		MTime:       internal.Duration{Duration: 0},
 		fileFilters: nil,
 	}
diff --git a/plugins/inputs/filecount/filecount_test.go b/plugins/inputs/filecount/filecount_test.go
index 16bb83de5..7a48c2166 100644
--- a/plugins/inputs/filecount/filecount_test.go
+++ b/plugins/inputs/filecount/filecount_test.go
@@ -70,7 +70,7 @@ func TestRegularOnlyFilter(t *testing.T) {
 
 func TestSizeFilter(t *testing.T) {
 	fc := getNoFilterFileCount("testdata")
-	fc.Size = -100
+	fc.Size = internal.Size{Size: -100}
 	matches := []string{"foo", "bar", "baz", "subdir/quux", "subdir/quuz"}
 
 	acc := testutil.Accumulator{}
@@ -78,7 +78,7 @@ func TestSizeFilter(t *testing.T) {
 
 	require.True(t, assertFileCount(&acc, "testdata", len(matches)))
 
-	fc.Size = 100
+	fc.Size = internal.Size{Size: 100}
 	matches = []string{"qux"}
 
 	acc = testutil.Accumulator{}
@@ -119,7 +119,7 @@ func getNoFilterFileCount(dir string) FileCount {
 		Name:        "*",
 		Recursive:   true,
 		RegularOnly: false,
-		Size:        0,
+		Size:        internal.Size{Size: 0},
 		MTime:       internal.Duration{Duration: 0},
 		fileFilters: nil,
 	}
diff --git a/plugins/inputs/http_listener_v2/README.md b/plugins/inputs/http_listener_v2/README.md
index 6d5d25aa4..f5a853189 100644
--- a/plugins/inputs/http_listener_v2/README.md
+++ b/plugins/inputs/http_listener_v2/README.md
@@ -28,8 +28,8 @@ This is a sample configuration for the plugin.
   # write_timeout = "10s"
 
   ## Maximum allowed http request body size in bytes.
-  ## 0 means to use the default of 536,870,912 bytes (500 mebibytes)
-  # max_body_size = 0
+  ## 0 means to use the default of 524,288,000 bytes (500 mebibytes)
+  # max_body_size = "500MB"
 
   ## Set one or more allowed client CA certificate file names to
   ## enable mutually authenticated TLS connections
diff --git a/plugins/inputs/http_listener_v2/http_listener_v2.go b/plugins/inputs/http_listener_v2/http_listener_v2.go
index 871d1080b..3fd8989f9 100644
--- a/plugins/inputs/http_listener_v2/http_listener_v2.go
+++ b/plugins/inputs/http_listener_v2/http_listener_v2.go
@@ -31,7 +31,7 @@ type HTTPListenerV2 struct {
 	Methods        []string
 	ReadTimeout    internal.Duration
 	WriteTimeout   internal.Duration
-	MaxBodySize    int64
+	MaxBodySize    internal.Size
 	Port           int
 
 	tlsint.ServerConfig
@@ -65,8 +65,8 @@ const sampleConfig = `
   # write_timeout = "10s"
 
   ## Maximum allowed http request body size in bytes.
-  ## 0 means to use the default of 536,870,912 bytes (500 mebibytes)
-  # max_body_size = 0
+  ## 0 means to use the default of 524,288,00 bytes (500 mebibytes)
+  # max_body_size = "500MB"
 
   ## Set one or more allowed client CA certificate file names to 
   ## enable mutually authenticated TLS connections
@@ -106,8 +106,8 @@ func (h *HTTPListenerV2) SetParser(parser parsers.Parser) {
 
 // Start starts the http listener service.
 func (h *HTTPListenerV2) Start(acc telegraf.Accumulator) error {
-	if h.MaxBodySize == 0 {
-		h.MaxBodySize = defaultMaxBodySize
+	if h.MaxBodySize.Size == 0 {
+		h.MaxBodySize.Size = defaultMaxBodySize
 	}
 
 	if h.ReadTimeout.Duration < time.Second {
@@ -173,7 +173,7 @@ func (h *HTTPListenerV2) ServeHTTP(res http.ResponseWriter, req *http.Request) {
 
 func (h *HTTPListenerV2) serveWrite(res http.ResponseWriter, req *http.Request) {
 	// Check that the content length is not too large for us to handle.
-	if req.ContentLength > h.MaxBodySize {
+	if req.ContentLength > h.MaxBodySize.Size {
 		tooLarge(res)
 		return
 	}
@@ -204,7 +204,7 @@ func (h *HTTPListenerV2) serveWrite(res http.ResponseWriter, req *http.Request)
 		defer body.Close()
 	}
 
-	body = http.MaxBytesReader(res, body, h.MaxBodySize)
+	body = http.MaxBytesReader(res, body, h.MaxBodySize.Size)
 	bytes, err := ioutil.ReadAll(body)
 	if err != nil {
 		tooLarge(res)
diff --git a/plugins/inputs/http_listener_v2/http_listener_v2_test.go b/plugins/inputs/http_listener_v2/http_listener_v2_test.go
index 3287ea59e..ab0c89f81 100644
--- a/plugins/inputs/http_listener_v2/http_listener_v2_test.go
+++ b/plugins/inputs/http_listener_v2/http_listener_v2_test.go
@@ -13,6 +13,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/influxdata/telegraf/internal"
 	"github.com/influxdata/telegraf/plugins/parsers"
 	"github.com/influxdata/telegraf/testutil"
 
@@ -51,7 +52,7 @@ func newTestHTTPListenerV2() *HTTPListenerV2 {
 		Methods:        []string{"POST"},
 		Parser:         parser,
 		TimeFunc:       time.Now,
-		MaxBodySize:    70000,
+		MaxBodySize:    internal.Size{Size: 70000},
 	}
 	return listener
 }
@@ -234,7 +235,7 @@ func TestWriteHTTPExactMaxBodySize(t *testing.T) {
 		Path:           "/write",
 		Methods:        []string{"POST"},
 		Parser:         parser,
-		MaxBodySize:    int64(len(hugeMetric)),
+		MaxBodySize:    internal.Size{Size: int64(len(hugeMetric))},
 		TimeFunc:       time.Now,
 	}
 
@@ -256,7 +257,7 @@ func TestWriteHTTPVerySmallMaxBody(t *testing.T) {
 		Path:           "/write",
 		Methods:        []string{"POST"},
 		Parser:         parser,
-		MaxBodySize:    4096,
+		MaxBodySize:    internal.Size{Size: 4096},
 		TimeFunc:       time.Now,
 	}
 
diff --git a/plugins/inputs/influxdb_listener/http_listener.go b/plugins/inputs/influxdb_listener/http_listener.go
index 29beff9a8..b8abeecd7 100644
--- a/plugins/inputs/influxdb_listener/http_listener.go
+++ b/plugins/inputs/influxdb_listener/http_listener.go
@@ -39,8 +39,8 @@ type HTTPListener struct {
 	ServiceAddress string
 	ReadTimeout    internal.Duration
 	WriteTimeout   internal.Duration
-	MaxBodySize    int64
-	MaxLineSize    int
+	MaxBodySize    internal.Size
+	MaxLineSize    internal.Size
 	Port           int
 
 	tlsint.ServerConfig
@@ -84,12 +84,12 @@ const sampleConfig = `
   write_timeout = "10s"
 
   ## Maximum allowed http request body size in bytes.
-  ## 0 means to use the default of 536,870,912 bytes (500 mebibytes)
-  max_body_size = 0
+  ## 0 means to use the default of 524,288,000 bytes (500 mebibytes)
+  max_body_size = "500MiB"
 
   ## Maximum line size allowed to be sent in bytes.
   ## 0 means to use the default of 65536 bytes (64 kibibytes)
-  max_line_size = 0
+  max_line_size = "64KiB"
 
   ## Set one or more allowed client CA certificate file names to
   ## enable mutually authenticated TLS connections
@@ -139,11 +139,11 @@ func (h *HTTPListener) Start(acc telegraf.Accumulator) error {
 	h.BuffersCreated = selfstat.Register("http_listener", "buffers_created", tags)
 	h.AuthFailures = selfstat.Register("http_listener", "auth_failures", tags)
 
-	if h.MaxBodySize == 0 {
-		h.MaxBodySize = DEFAULT_MAX_BODY_SIZE
+	if h.MaxBodySize.Size == 0 {
+		h.MaxBodySize.Size = DEFAULT_MAX_BODY_SIZE
 	}
-	if h.MaxLineSize == 0 {
-		h.MaxLineSize = DEFAULT_MAX_LINE_SIZE
+	if h.MaxLineSize.Size == 0 {
+		h.MaxLineSize.Size = DEFAULT_MAX_LINE_SIZE
 	}
 
 	if h.ReadTimeout.Duration < time.Second {
@@ -154,7 +154,7 @@ func (h *HTTPListener) Start(acc telegraf.Accumulator) error {
 	}
 
 	h.acc = acc
-	h.pool = NewPool(200, h.MaxLineSize)
+	h.pool = NewPool(200, int(h.MaxLineSize.Size))
 
 	tlsConf, err := h.ServerConfig.TLSConfig()
 	if err != nil {
@@ -241,7 +241,7 @@ func (h *HTTPListener) ServeHTTP(res http.ResponseWriter, req *http.Request) {
 
 func (h *HTTPListener) serveWrite(res http.ResponseWriter, req *http.Request) {
 	// Check that the content length is not too large for us to handle.
-	if req.ContentLength > h.MaxBodySize {
+	if req.ContentLength > h.MaxBodySize.Size {
 		tooLarge(res)
 		return
 	}
@@ -261,7 +261,7 @@ func (h *HTTPListener) serveWrite(res http.ResponseWriter, req *http.Request) {
 			return
 		}
 	}
-	body = http.MaxBytesReader(res, body, h.MaxBodySize)
+	body = http.MaxBytesReader(res, body, h.MaxBodySize.Size)
 
 	var return400 bool
 	var hangingBytes bool
diff --git a/plugins/inputs/influxdb_listener/http_listener_test.go b/plugins/inputs/influxdb_listener/http_listener_test.go
index 3277e5344..964295061 100644
--- a/plugins/inputs/influxdb_listener/http_listener_test.go
+++ b/plugins/inputs/influxdb_listener/http_listener_test.go
@@ -13,6 +13,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/influxdata/telegraf/internal"
 	"github.com/influxdata/telegraf/testutil"
 
 	"github.com/stretchr/testify/require"
@@ -217,7 +218,7 @@ func TestWriteHTTPNoNewline(t *testing.T) {
 func TestWriteHTTPMaxLineSizeIncrease(t *testing.T) {
 	listener := &HTTPListener{
 		ServiceAddress: "localhost:0",
-		MaxLineSize:    128 * 1000,
+		MaxLineSize:    internal.Size{Size: 128 * 1000},
 		TimeFunc:       time.Now,
 	}
 
@@ -235,7 +236,7 @@ func TestWriteHTTPMaxLineSizeIncrease(t *testing.T) {
 func TestWriteHTTPVerySmallMaxBody(t *testing.T) {
 	listener := &HTTPListener{
 		ServiceAddress: "localhost:0",
-		MaxBodySize:    4096,
+		MaxBodySize:    internal.Size{Size: 4096},
 		TimeFunc:       time.Now,
 	}
 
@@ -252,7 +253,7 @@ func TestWriteHTTPVerySmallMaxBody(t *testing.T) {
 func TestWriteHTTPVerySmallMaxLineSize(t *testing.T) {
 	listener := &HTTPListener{
 		ServiceAddress: "localhost:0",
-		MaxLineSize:    70,
+		MaxLineSize:    internal.Size{Size: 70},
 		TimeFunc:       time.Now,
 	}
 
@@ -279,7 +280,7 @@ func TestWriteHTTPVerySmallMaxLineSize(t *testing.T) {
 func TestWriteHTTPLargeLinesSkipped(t *testing.T) {
 	listener := &HTTPListener{
 		ServiceAddress: "localhost:0",
-		MaxLineSize:    100,
+		MaxLineSize:    internal.Size{Size: 100},
 		TimeFunc:       time.Now,
 	}
 
diff --git a/plugins/inputs/socket_listener/README.md b/plugins/inputs/socket_listener/README.md
index ff73b1fbb..2f1a0572e 100644
--- a/plugins/inputs/socket_listener/README.md
+++ b/plugins/inputs/socket_listener/README.md
@@ -42,11 +42,11 @@ This is a sample configuration for the plugin.
   ## Enables client authentication if set.
   # tls_allowed_cacerts = ["/etc/telegraf/clientca.pem"]
 
-  ## Maximum socket buffer size in bytes.
+  ## Maximum socket buffer size (in bytes when no unit specified).
   ## For stream sockets, once the buffer fills up, the sender will start backing up.
   ## For datagram sockets, once the buffer fills up, metrics will start dropping.
   ## Defaults to the OS default.
-  # read_buffer_size = 65535
+  # read_buffer_size = "64KiB"
 
   ## Period between keep alive probes.
   ## Only applies to TCP sockets.
diff --git a/plugins/inputs/socket_listener/socket_listener.go b/plugins/inputs/socket_listener/socket_listener.go
index daab84952..73c321f81 100644
--- a/plugins/inputs/socket_listener/socket_listener.go
+++ b/plugins/inputs/socket_listener/socket_listener.go
@@ -47,9 +47,9 @@ func (ssl *streamSocketListener) listen() {
 			break
 		}
 
-		if ssl.ReadBufferSize > 0 {
+		if ssl.ReadBufferSize.Size > 0 {
 			if srb, ok := c.(setReadBufferer); ok {
-				srb.SetReadBuffer(ssl.ReadBufferSize)
+				srb.SetReadBuffer(int(ssl.ReadBufferSize.Size))
 			} else {
 				log.Printf("W! Unable to set read buffer on a %s socket", ssl.sockType)
 			}
@@ -164,7 +164,7 @@ func (psl *packetSocketListener) listen() {
 type SocketListener struct {
 	ServiceAddress  string             `toml:"service_address"`
 	MaxConnections  int                `toml:"max_connections"`
-	ReadBufferSize  int                `toml:"read_buffer_size"`
+	ReadBufferSize  internal.Size      `toml:"read_buffer_size"`
 	ReadTimeout     *internal.Duration `toml:"read_timeout"`
 	KeepAlivePeriod *internal.Duration `toml:"keep_alive_period"`
 	tlsint.ServerConfig
@@ -209,11 +209,11 @@ func (sl *SocketListener) SampleConfig() string {
   ## Enables client authentication if set.
   # tls_allowed_cacerts = ["/etc/telegraf/clientca.pem"]
 
-  ## Maximum socket buffer size in bytes.
+  ## Maximum socket buffer size (in bytes when no unit specified).
   ## For stream sockets, once the buffer fills up, the sender will start backing up.
   ## For datagram sockets, once the buffer fills up, metrics will start dropping.
   ## Defaults to the OS default.
-  # read_buffer_size = 65535
+  # read_buffer_size = "64KiB"
 
   ## Period between keep alive probes.
   ## Only applies to TCP sockets.
@@ -286,9 +286,9 @@ func (sl *SocketListener) Start(acc telegraf.Accumulator) error {
 			return err
 		}
 
-		if sl.ReadBufferSize > 0 {
+		if sl.ReadBufferSize.Size > 0 {
 			if srb, ok := pc.(setReadBufferer); ok {
-				srb.SetReadBuffer(sl.ReadBufferSize)
+				srb.SetReadBuffer(int(sl.ReadBufferSize.Size))
 			} else {
 				log.Printf("W! Unable to set read buffer on a %s socket", spl[0])
 			}
diff --git a/plugins/inputs/socket_listener/socket_listener_test.go b/plugins/inputs/socket_listener/socket_listener_test.go
index 26691ef54..ae7fef8b9 100644
--- a/plugins/inputs/socket_listener/socket_listener_test.go
+++ b/plugins/inputs/socket_listener/socket_listener_test.go
@@ -11,6 +11,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/influxdata/telegraf/internal"
 	"github.com/influxdata/telegraf/testutil"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -81,7 +82,7 @@ func TestSocketListener_tcp(t *testing.T) {
 
 	sl := newSocketListener()
 	sl.ServiceAddress = "tcp://127.0.0.1:0"
-	sl.ReadBufferSize = 1024
+	sl.ReadBufferSize = internal.Size{Size: 1024}
 
 	acc := &testutil.Accumulator{}
 	err := sl.Start(acc)
@@ -99,7 +100,7 @@ func TestSocketListener_udp(t *testing.T) {
 
 	sl := newSocketListener()
 	sl.ServiceAddress = "udp://127.0.0.1:0"
-	sl.ReadBufferSize = 1024
+	sl.ReadBufferSize = internal.Size{Size: 1024}
 
 	acc := &testutil.Accumulator{}
 	err := sl.Start(acc)
@@ -123,7 +124,7 @@ func TestSocketListener_unix(t *testing.T) {
 	os.Create(sock)
 	sl := newSocketListener()
 	sl.ServiceAddress = "unix://" + sock
-	sl.ReadBufferSize = 1024
+	sl.ReadBufferSize = internal.Size{Size: 1024}
 
 	acc := &testutil.Accumulator{}
 	err = sl.Start(acc)
@@ -147,7 +148,7 @@ func TestSocketListener_unixgram(t *testing.T) {
 	os.Create(sock)
 	sl := newSocketListener()
 	sl.ServiceAddress = "unixgram://" + sock
-	sl.ReadBufferSize = 1024
+	sl.ReadBufferSize = internal.Size{Size: 1024}
 
 	acc := &testutil.Accumulator{}
 	err = sl.Start(acc)
diff --git a/plugins/outputs/influxdb/README.md b/plugins/outputs/influxdb/README.md
index e9b3b0346..5d223ca3d 100644
--- a/plugins/outputs/influxdb/README.md
+++ b/plugins/outputs/influxdb/README.md
@@ -42,7 +42,7 @@ The InfluxDB output plugin writes metrics to the [InfluxDB v1.x] HTTP or UDP ser
   # user_agent = "telegraf"
 
   ## UDP payload size is the maximum packet size to send.
-  # udp_payload = 512
+  # udp_payload = "512B"
 
   ## Optional TLS Config for use on HTTP connections.
   # tls_ca = "/etc/telegraf/ca.pem"
diff --git a/plugins/outputs/influxdb/influxdb.go b/plugins/outputs/influxdb/influxdb.go
index 06079dfc5..1f61b801f 100644
--- a/plugins/outputs/influxdb/influxdb.go
+++ b/plugins/outputs/influxdb/influxdb.go
@@ -41,7 +41,7 @@ type InfluxDB struct {
 	RetentionPolicy      string
 	WriteConsistency     string
 	Timeout              internal.Duration
-	UDPPayload           int               `toml:"udp_payload"`
+	UDPPayload           internal.Size     `toml:"udp_payload"`
 	HTTPProxy            string            `toml:"http_proxy"`
 	HTTPHeaders          map[string]string `toml:"http_headers"`
 	ContentEncoding      string            `toml:"content_encoding"`
@@ -95,7 +95,7 @@ var sampleConfig = `
   # user_agent = "telegraf"
 
   ## UDP payload size is the maximum packet size to send.
-  # udp_payload = 512
+  # udp_payload = "512B"
 
   ## Optional TLS Config for use on HTTP connections.
   # tls_ca = "/etc/telegraf/ca.pem"
@@ -225,7 +225,7 @@ func (i *InfluxDB) Write(metrics []telegraf.Metric) error {
 func (i *InfluxDB) udpClient(url *url.URL) (Client, error) {
 	config := &UDPConfig{
 		URL:            url,
-		MaxPayloadSize: i.UDPPayload,
+		MaxPayloadSize: int(i.UDPPayload.Size),
 		Serializer:     i.serializer,
 	}
 
diff --git a/plugins/outputs/influxdb/influxdb_test.go b/plugins/outputs/influxdb/influxdb_test.go
index 3ec10989e..63ecc47be 100644
--- a/plugins/outputs/influxdb/influxdb_test.go
+++ b/plugins/outputs/influxdb/influxdb_test.go
@@ -74,7 +74,7 @@ func TestConnectUDPConfig(t *testing.T) {
 
 	output := influxdb.InfluxDB{
 		URLs:       []string{"udp://localhost:8089"},
-		UDPPayload: 42,
+		UDPPayload: internal.Size{Size: 42},
 
 		CreateUDPClientF: func(config *influxdb.UDPConfig) (influxdb.Client, error) {
 			actual = config