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) ...
for each single braid 2 cm ( about 0.7 inch) for each beaded chain 2.5 cm ( 1 inch) for clasp beads : 4mm, 6mm, 8mm ( abacus ...