Monthly Archives: March 2012

Needle Gauge Comparison Chart

Hypodermic needles are available in a wide variety of outer diameters described by gauge numbers. Smaller gauge numbers indicate larger outer diameters. Inner diameter depends on both gauge and wall thickness. The following chart shows nominal inner diameter and wall thickness for regular-wall needles. Thin-wall needles (not shown) have identical outer diameters but larger inner diameters for a given gauge.

Needle wire gauge is derived from the Birmingham Wire Gauge. #1 = 18½ B.W.G.; #2 = 19 B.W.G., and so on to #14 = 31 B.W.G.

Needle
Nominal Outer Diameter
Nominal Inner Diameter
Nominal Wall Thickness
Gauge
inches
mm
tol. inches (mm)
inches
mm
tol. inches (mm)
inches
mm
tol. inches (mm)
7
0.180
4.572
±0.001 (±0.025)
0.150
3.810
±0.003 (±0.076)
0.015
0.381
±0.001 (±0.025)
8
0.165
4.191
0.135
3.429
9
0.148
3.759
0.118
2.997
10
0.134
3.404
0.106
2.692
0.014
0.356
11
0.120
3.048
0.094
2.388
0.013
0.330
12
0.109
2.769
0.085
2.159
0.012
0.305
13
0.095
2.413
0.071
1.803
14
0.083
2.108
0.063
1.600
0.01
0.254
15
0.072
1.829
±0.0005 (±0.013)
0.054
1.372
±0.0015 (±0.038)
0.009
0.229
±0.0005 (±0.013)
16
0.065
1.651
0.047
1.194
17
0.058
1.473
0.042
1.067
0.008
0.203
18
0.050
1.270
0.033
0.838
0.0085
0.216
19
0.042
1.067
0.027
0.686
0.0075
0.191
20
0.03575
0.9081
±0.00025 (±0.0064)
0.02375
0.603
±0.00075 (±0.019)
0.006
0.1524
±0.00025 (±0.0064)
21
0.03225
0.8192
0.02025
0.514
22
0.02825
0.7176
0.01625
0.413
22s
0.006
0.152
0.0111
0.2826
23
0.02525
0.6414
0.01325
0.337
0.006
0.1524
24
0.02225
0.5652
0.01225
0.311
0.005
0.1270
25
0.02025
0.5144
0.01025
0.260
26
0.01825
0.4636
0.004
0.1016
26s
0.01865
0.4737
0.005
0.127
0.0068
0.1734
27
0.01625
0.4128
0.00825
0.210
0.004
0.1016
28
0.01425
0.3620
0.00725
0.184
0.0035
0.0889
29
0.01325
0.3366
0.003
0.0762
30
0.01225
0.3112
0.00625
0.159
31
0.01025
0.2604
0.00525
0.133
0.0025
0.0635
32
0.00925
0.2350
0.00425
0.108
33
0.00825
0.2096
0.002
0.0508
34
0.00725
0.1842
0.00325
0.0826

What size glove do I need?

Glove Sizing Guide
1.      With hand extended flat, loosely loop measuring tape around the circumference at the knuckles (area indicated in picture)

2.      Keeping measuring tape around the knuckles, make a fist with your hand

3.      Adjust tension to match how you prefer your gloves to fit. (looser for a baggier fit, tighter for a snugger fit).

4.      Record circumference measurement in inches. Match size to chart below. The Sizing Charts below are a general approximation and can be used to assist in glove sizing. When trying on gloves, to be sure a glove fits properly it should:

a) Fit at the base of the fingers
b) Fit comfortable over the extended thumb
c) Fit comfortably at the base of the thumb
d) Not become baggy when you flex your hand

Inches
Women’s Size
Men’s Size
5-5.5
X-Small
5.5-6.5
Small
X-Small
6.5-7.5
Medium
Small
7.5-8.5
Large
Medium
8.5-9.5
X-Large
Large
9.5-10.5
XX-Large
X-Large
10.5-11.5
XX-Large