Standard Hypodermic Sizes - Type 304 Stainless Steel 
Custom Sizes and Materials Available

  

Gauge

Nom Wall

Outside Diamter (min - max)

Inside Diamter (min-max)
 

6RW  

.0150

.2020-.2040

.1700-.1760
 

6TW

.0100

.2020-.2040

.1800-.1860
 

7RW

.0150

.1790-.1810

.1470-.1530
 

7TW

.0100

.1790-.1810

.1570-.1630
  8RW .0155 .1640-.1660 .1320-.1380
  8TW .0100 .1640-.1660 .1420-.1480
  9RW .0150 .1470-.1490 .1150-.1210
  9TW .0100 .1470-.1490 .1250-.1310
  10RW .0140 .1330-.1350 .1040-.1080
  10TW .0100 .1330-.1350 .1120-.1160
  10XTW .0080 .1330-.1350 .1160-.1200
  11RW .0130 .1190-.1210 .0920-.0960
  11TW .0100 .1190-.1210 .0980-.1020
  11XTW .0080 .1190-.1210 .1020-.1060
  12RW .0120 .1080-.1100 .0830-.0870
  12TW .0090 .1080-.1100 .0890-.0930
  12XTW .0070 .1080-.1100 .0930-.0970
  13RW .0120 .0940-.0960 .0690-.0730
  13TW .0090 .0940-.0960 .0750-.0790
  13XTW .0070 .0940-.0960 .0790-.0830
  14RW .0100 .0820-.0840 .0610-.0650
  14TW .0080 .0820-.0840 .0660-.0685
  14XTW .0055 .0820-.0840 .0710-.0730
  14UTW .0045 .0820-.0840 .0730-.0760
  15RW .0090 .0715-.0725 .0525-.0555
  15TW .0060 .0715-.0725 .0595-.0615
  15XTW .0050 .0715-.0725 .0615-.0635
  15UTW .0040 .0715-.0725 .0635-.0655
  16RW .0090 .0645-.0655 .0455-.0485
  16TW .0060 .0645-.0655 .0525-.0545
  16XTW .0050 .0645-.0655 .0545-.0565
  16UTW .0040 .0645-.0655 .0565-.0585
  17RW .0080 .0575-.0585 .0405-.0435
  17TW .0050  .0575-.0585 .0465-.0485
  17XTW .0040  .0575-.0585 .0490-.0510
  17UTW .0030  .0575-.0585 .0510-.0530
  18RW .0085 .0495-.0505 .0315-.0345
  18TW  .0060 .0495-.0505 .0375-.0395
  18XTW .0040 .0495-.0505 .0410-.0430
  18UTW .0030 .0495-.0505 .0430-.0450
  19RW .0075 .0415-.0425 .0255-.0285
  19TW   .0050 .0415-.0425 .0315-.0335
  19XTW .0035 .0415-.0425 .0340-.0360
  19UTW  .0025 .0415-.0425  .0360-.0380
  20RW .0060 .0355-.0360 .0230-.0245
  20TW  .0050 .0355-.0360 .0255-.0270
  20XTW .0040 .0355-.0360 .0270-.0285
  20UTW .0030 .0355-.0360 .0290-.0305
  2IRW .0060 .0320-.0325 .0195-.0210
  21TW .0045 .0320-.0325 .0225-.0240
  21XTW .0035 .0320-.0325 .0245-.0260
  21UTW .0025 .0320-.0325 .0265-.0280
  22RW .0060 .0280-.0285 .0155-.0170
  22TW .0040 .0280-.0285 .0190-.0205
  22XTW .0030 .0280-.0285 .0215-.0230
  22UTW .0020 .0280-.0285 .0235-.0250
  23RW .0060 .0250-.0255 .0125-.0140
  23TW .0040 .0250-.0255 .0165-.0180
  23XTW  .0030 .0250-.0255 .0185-.0200
  23UTW .0020 .0250-.0255 .0205-.0220
  24RW .0050 .0220-.0225 .0115-.0130
  24TW .0040 .0220-.0225 .0135-.0155
  24XTW .0030 .0220-.0225 .0155-.0170
  24UTW .0020 .0220-.0225 .0175-.0190
  25RW .0050 .0200-.0205 .0095-.0110
  25TW .0040 .0200-.0205 .0115-.0130
  25XTW .0030 .0200-.0205 .0135-.0150
  25UTW .0020 .0200-.0205 .0155-.0170
  26RW .0040 .0180-.0185 .0095-.0110
  26TW  .0030 .0180-.0185 .0115-.0130
  26XTW .0020 .0180-.0185 .0130-.0145
  27RW  .0040 .0160-.0165 .0075-.0090
  27TW .0030 .0160-.0165 .0095-.0110
  27XTW .0020 .0160-.0165 .0115-.0130
  28RW .0035 .0140-.0145 .0065-.0080
  28TW .0025 .0140-.0145 .0085-.0100
  29RW .0030 .0130-.0135 .0065-.0080
  29TW  .0025 .0130-.0135 .0080-.0090
  30RW .0030 .0120-.0125 .0055-.0070
  30TW   .0025 .0120-.0125 .0070-.0080
  32RW .0025 .0090-.0095 .0035-.0050
  33RW .0020 .0080-.0085 .0035-.0050
  34RW .0020 .0070-.0075 .0025-.0040