A=17,00 mm; B=19,00 mm: C=2,00 mm, sterling silver (AG-925)
A=8,30 mm; B=25,50 mm; C=0,80 mm, sterling silver (AG-925)
a=19,00 mm; b=11,00 mm, sterling silver (AG-925); the widths of the wire: 0,80 mm
A=9,00 mm; B=5,00 mm; C=1,10 mm, sterling silver (AG-925)