Wire rod · Size & tolerance table

Wire rod diameters and mass per metre

Standard: ISO 16124 (dimensions) · EN 10017 · ASTM A510/A510M

Wire rod is rolled in coils and sold by the nominal diameter. 5.5 mm is by far the most traded size because it is the usual feed for drawing down to common wire sizes; 6.5–12 mm goes to thicker wire, mesh, fasteners and coiled rebar.

Mass and length are for a round of the nominal diameter at 7,850 kg/m³. Diameter tolerance and out-of-roundness are set by ISO 16124 (by tolerance class), EN 10017 for rod for drawing, or ASTM A510 — state which, and the class, when ordering.

Nominal diameters

Diameter mm	Area mm²	Mass kg/m	Length per tonne m/t
5	19.6	0.154	6488
5.5	23.8	0.187	5362
6	28.3	0.222	4505
6.5	33.2	0.260	3839
7	38.5	0.302	3310
8	50.3	0.395	2534
9	63.6	0.499	2002
10	78.5	0.617	1622
11	95.0	0.746	1340
12	113.1	0.888	1126
13	132.7	1.042	960
14	153.9	1.208	828
16	201.1	1.578	634
18	254.5	1.998	501
20	314.2	2.466	405

Notes

Coils usually weigh 1.5–2.5 t, compacted and tied with four or more bands; heavier coils suit high-speed drawing lines with fewer stops.
7/32 in (5.56 mm) and 1/4 in (6.35 mm) are the inch sizes still quoted in North America.