Terdapat berbagai macam ukuran jarum hipodermik yang ditandai dengan nomor gauge (G), yang berbanding terbalik terhadap diameter jarum. Semakin besar nomornya, semakin kecil diameter jarum. Demikian pula sebaliknya. Gauge (Inggris) berarti ukuran.
Berikut adalah tabel perbandingan ukuran jarum hipodermik:
| Jarum
|
Perkiraan Diameter Luar
|
Perkiraan Diameter Dalam
|
| Gauge
|
mm
|
inchi
|
toleransi (in.)
|
mm
|
inchi
|
toleransi (in.)
|
| 10
|
3.404
|
0.1340
|
±0.0010
|
2.692
|
0.1060
|
±0.0020
|
| 11
|
3.048
|
0.1200
|
"
|
2.388
|
0.0940
|
"
|
| 12
|
2.769
|
0.1090
|
"
|
2.159
|
0.0850
|
"
|
| 13
|
2.413
|
0.0950
|
"
|
1.803
|
0.0710
|
"
|
| 14
|
2.108
|
0.0830
|
"
|
1.600
|
0.0630
|
"
|
| 15
|
1.829
|
0.0720
|
±0.0005
|
1.372
|
0.0540
|
±0.0015
|
| 16
|
1.651
|
0.0650
|
"
|
1.194
|
0.0470
|
"
|
| 17
|
1.473
|
0.0580
|
"
|
1.067
|
0.0420
|
"
|
| 18
|
1.270
|
0.0500
|
"
|
0.838
|
0.0330
|
"
|
| 19
|
1.067
|
0.0420
|
"
|
0.686
|
0.0270
|
"
|
| 20
|
0.902
|
0.0355
|
+0.0005
-0.0000
|
0.584
|
0.0230
|
+0.0015
-0.0000
|
| 21
|
0.813
|
0.0320
|
"
|
0.495
|
0.0195
|
"
|
| 22
|
0.711
|
0.0280
|
"
|
0.394
|
0.0155
|
"
|
| 22s
|
0.711
|
0.0280
|
"
|
0.140
|
0.0055
|
"
|
| 23
|
0.635
|
0.0250
|
"
|
0.318
|
0.0125
|
"
|
| 24
|
0.559
|
0.0220
|
"
|
0.292
|
0.0115
|
"
|
| 25
|
0.508
|
0.0200
|
"
|
0.241
|
0.0095
|
"
|
| 25s
|
0.508
|
0.0200
|
"
|
0.140
|
0.0055
|
"
|
| 26
|
0.457
|
0.0180
|
"
|
0.241
|
0.0095
|
"
|
| 26s
|
0.467
|
0.0184
|
"
|
0.114
|
0.0045
|
"
|
| 27
|
0.406
|
0.0160
|
"
|
0.191
|
0.0075
|
"
|
| 28
|
0.356
|
0.0140
|
"
|
0.165
|
0.0065
|
"
|
| 29
|
0.330
|
0.0130
|
"
|
0.165
|
0.0065
|
"
|
| 30
|
0.305
|
0.0120
|
"
|
0.140
|
0.0055
|
"
|
| 31
|
0.254
|
0.0100
|
"
|
0.114
|
0.0045
|
"
|
| 32
|
0.229
|
0.0090
|
"
|
0.089
|
0.0035
|
"
|
| 33
|
0.203
|
0.0080
|
"
|
0.089
|
0.0035
|
"
|
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