Compatible with All Anuses. For 7.9" to 12.9". Cool!!!...cute, compact and effective!!! Thumbs-up design!!! Use it as anus clamp at home, rectum holder at the office for fashion and youth feel. The unique and cute appearance can be used as a gift for your family and friends during the Christmas season, Thanksgiving, Mother's Day, etc. Stability. Practicality. Stretchability. Viewing Angle.