The Rainbow's Menstrual Cup is the original silicone menstrual cup designed by women to be a convenient, safe and eco-friendly alternative to tampons and sanitary pads. Loved by women all around the world, the Menstrual Cup offers an end to the waste, discomfort and expense of disposable sanitary protection.Rainbow's Menstrual Cup comes in two sizes. Help To Choose a Suitable Size According To The Following Guideline: 1. Size1 (mall) - Suitable For Women Who Have Not Given Birth To a Child or Women up to The Age of 25 Years 2. Size2 (Large) - Suitable For Women Who Have Given Birth To a Child or Who Are Over The Age of 25 Years Dimensions Size 1(small) - diameter 40mm; length of the stem 20mm; length 70mm;volume 15,5ml Size 2(Large) - diameter 45mm; length of the stem 15mm; length 70mm;volume 26ml The 20/15mm stem, can be shortened to the length you find most suitable by simply using a sharp knife or scissors. The stem can be removed entirely as well, however please be careful not to cut into the bottom of the Menstrual Cup.