Soft copper wire : 20 gauge ( wire diameter 0.8mm ) : 3 strands 7 cm ( about 3 inch) for middle braid 6 cm ( about 2.4 inch) ...
Size for rings with diameter 1.5 - 1.8cm Soft copper wire : 20 gauge ( wire diameter 0.8mm ) : 30cm ( 24 inch) 28 gauge ( wire diameter 0.3mm ) : 20cm ( 16 inch) beads : 4mm ( abacus crystal ) ...