For chaplets, we use wire diameters from about 1.6mm to 4 mm. Washer / plate diameter from about 6mm (1/4 in) to 19mm (3/4 in) (20 mm on some half parts) with thickness from about 0.5mm to 1.2 mm.
The plates can be perforated, usually with 4, 6, 8 or 18 holes. (4 holes for squares)
The heights range from about 4mm to say 25mm.
Solid chaplets (i.e. formed from a single piece of wire) have similar range in height and wire diameters, but the heads formed can really only be upto about 3 wire diameters .. and they will not be particularly round.
We manufacture Aluminium and mild steel chaplets .