This is a great option if you're unsure of what size to pick or if you want more than one cup. You get two cups of your choice in individual cotton bags in one box.Hello Cup XS – Extra Small Menstrual CupOur smallest and softest menstrual cup. Great option for teenagers, petite users and those who prefer a ‘mini' tampon. The diameter of the XS is 38mm and the overall length including the toggle is 57mm. It holds 17.5ml (to the holes).Hello Cup S/M (Small/Medium)Our ‘one size fits most' menstrual cup. As a rule of thumb we recommend the S/M for users under 35. Physically active/fit users often find the S/M is best for them regardless of age or whether they've had children. The diameter of the S/M is 41mm and the overall length, including the toggle, is 59mm. It holds 21mls (to the holes).The Hello Cup is a complete game changer when it comes to your period.HypoallergenicMedical-GradeHolds three times more than tamponsReusable for yearsSilicone-FreeBPA FreeDesigned by a nurseMade in New Zealand