(inches) Size 1 Size 2 (mm) Size 1 Size 2
Diameter 1.60 1.80 Diameter 40 45
Cup Length 1.60 2.00 Cup Length 40 50
Stem Length 1.20 0.80 Stem Length 30 20
Total Length 2.80 2.80 Total Length 70 70
Capacity 23ml 30ml Capacity 23ml 30ml

Size 1 — Small, for women who haven’t previously given birth vaginally.

Size 2:  Large, for women who have given birth vaginally.