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Syringe needle gauge sizes


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Needle Nominal O.D. Nominal I.D. Nominal wall
Gauge mm inches mm inches mm inches
10 3.404 0.1340 2.692 0.1060 0.356 0.0140
11 3.048 0.1200 2.388 0.0940 0.330 0.0130
12 2.769 0.1090 2.159 0.0850 0.305 0.0120
13 2.413 0.0950 1.803 0.0710 0.305 0.0120
14 2.108 0.0830 1.600 0.0630 0.254 0.0100
15 1.829 0.0720 1.372 0.0540 0.229 0.0090
16 1.651 0.0650 1.194 0.470 0.229 0.0090
17 1.473 0.0580 1.067 0.0420 0.203 0.0080
18 1.270 0.050 0.838 0.0330 0.203 0.0080
19 1.067 0.0420 0.686 0.0270 0.191 0.0070
20 0.902 0.0355 0.584 0.0230 0.152 0.0060
21 0.813 0.0320 0.495 0.0195 0.152 0.0060
22 0.711 0.0280 0.394 0.0155 0.152 0.0060
22s 0.711 0.0280 0.140 0.0055 0.279 0.0110
23 0.635 0.0250 0.318 0.0125 0.152 0.0060
24 0.559 0.0220 0.292 0.0115 0.127 0.0050
25 0.508 0.020 0.241 0.0095 0.127 0.0050
25s 0.508 0.0200 0.140 0.0055 0.178 0.0070
26 0.457 0.0180 0.241 0.0095 0.102 0.0040
26s 0.467 0.0184 0.114 0.0045 0.178 0.0070
27 0.406 0.0160 0.191 0.0075 0.102 0.0040
28 0.356 0.0140 0.165 0.0065 0.089 0.0035
29 0.330 0.0130 0.165 0.0065 0.076 0.0030
30 0.305 0.0120 0.140 0.0055 0.076 0.0030
31 0.254 0.0100 0.114 0.0045 0.064 0.0020
32 0.229 0.0090 0.089 0.0035 0.051 0.0020
33 0.203 0.0080 0.089 0.0035 0.051 0.0020
Gauge mm inches mm inches mm inches
Needle Nominal O.D. Nominal I.D. Nominal wall


Reference: Aldrich 1994-1995 Catalog/Handbook of Fine Chemicals,
Aldrich Chemical Company Inc, Milwaukee, WI.



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Signature: Dhanlal De Lloyd, Chem. Dept, The University of The West Indies, St. Augustine campus
The Republic of Trinidad and Tobago.
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