Material: copper
Treatment process: diamond
US size comparison table:
No. 5 (diameter: 15.7 mm, circumference: 49.6 mm)
No. 6 (diameter: 16.5 mm, circumference: 51.8 mm)
No. 7 (diameter: 17.3mm, circumference: 54.4mm)
No. 8 (diameter: 18.1 mm, circumference: 56.5 mm)
No. 9 (diameter: 18.9 mm, circumference: 59.5 mm)
No. 10 (diameter: 19.8 mm, circumference: 62.1 mm)
No. 11 (diameter: 20mm, circumference: 64.6mm)
No. 12 (diameter: 21.4mm, circumference: 67.2mm)
No. 13 (diameter: 22.2mm, circumference: 69.7mm)
No. 14 (diameter: 23.2 mm, circumference: 73 mm)
