After pregnancy, the body goes through physical changes that need to be taken care of. The pains or cramps are due to the uterus returning to its pre-pregnancy size. Bamboo Belly Band helps keeping the uterus firm, and prevent excessive vaginal bleeding.Bamboo Belly Band is a compression undergardment made of Bamboo. The material is breathable and wearable for long periods of time. It offers overall abdominal support and stays in place. Helpful Hints for sizing your belly band:If you are still PREGNANT:(The eight month is pretty much the same as post delivery for most mom) - Measure the circumference of your belly starting at your belly button. Choose the corresponding band for your size. Just prior to delivery, simply subtract 3 to 5 inches from your belly measurement, select the corresponding band for that size.Post Delivery:Choose the corresponding band for your belly size.Package Includes: - 1 BAMBOO BELLY BAND POST PARTUM Comes in 4 Sizes: Please make sure you specify the sizes, if not we will have to randomly send and not liable for reshipping if it is not the right size.Band Size Fits Belly SizeS 33"- 37"M 38"-43"L 44"-49"XL 50"-57"