+0000-2 (0.70 mm to 1.20 mm) (SI to VVS quality)
+2-6½ (1.30 mm to 1.70 mm) (SI to VVS quality)
+6½ -11 (1.80 mm to 2.60 mm) (SI to VVS quality)
+11-16 (2.70 mm to 3.60 mm) (SI to VVS quality)
