MASURA INELELOR

Size	Inside measurement in inches		Inside measurement in millimeters
Size	diameter	circumference	diam.	circum.
½	0.474	1.489	12.0	37.8
1	0.490	1.539	12.4	39.1
1½	0.506	1.590	12.9	40.4
2	0.522	1.640	13.3	41.6
2½	0.538	1.690	13.7	42.9
3	0.554	1.740	14.1	44.2
3½	0.570	1.791	14.5	45.5
4	0.586	1.841	14.9	46.8
4½	0.602	1.891	15.3	48.0
5	0.618	1.942	15.7	49.3
5½	0.634	1.992	16.1	50.6
6	0.650	2.042	16.5	51.9
6½	0.666	2.092	16.9	53.1
7	0.682	2.143	17.3	54.4
7½	0.698	2.193	17.7	55.7
8	0.714	2.243	18.1	57.0
8½	0.730	2.293	18.5	58.2
9	0.746	2.344	18.9	59.5
9½	0.762	2.394	19.4	60.8
10	0.778	2.444	19.8	62.1
10½	0.794	2.494	20.2	63.3
11	0.810	2.545	20.6	64.6
11½	0.826	2.595	21.0	65.9
12	0.842	2.645	21.4	67.2
12½	0.858	2.695	21.8	68.5
13	0.874	2.746	22.2	69.7
13½	0.890	2.796	22.6	71.0