Conversion Charts & Instruments Measuring Guide

Inches	cm	mm
0.25	0.7	6
0.5	1.3	13
0.75	1.9	19
1	2.5	25
1.25	3.2	32
1.5	3.8	38
1.75	4.4	44
2	5.1	51
2.25	5.7	57
2.5	6.4	64
2.75	7.0	70
3	7.6	76
3.25	8.3	83
3.5	8.9	89
3.75	9.5	95
4	10.2	102
4.25	10.8	108
4.5	11.4	114
4.75	12.1	121
5	12.7	127
5.25	13.3	133
5.5	14.0	140
5.75	14.6	146
6	15.2	152
6.25	15.9	159
6.5	16.5	165
6.75	17.1	171
7	17.8	178
7.25	18.4	184
7.5	19.1	191
7.75	19.7	197
8	20.3	203
8.25	21.0	210
8.5	21.6	216
8.75	22.2	222
9	22.9	229
9.25	23.5	235
9.5	24.1	241
9.75	24.8	248
10	25.4	254
10.25	26.0	260
10.5	26.7	267
10.75	27.3	273
11	27.9	279
11.25	28.6	286
11.5	29.2	292
11.75	29.8	298
12	30.5	305

How to measure surgical instruments click here