Our patented design uses a double panel binder made with a nylon spandex blend and cotton for extra flattening effect. Model One is wearing a size L and has the measurements:Shoulders - 17 inchesChest - 30 inches Model Two is wearing a size L and has the measurements:Shoulders - 16 inchesChest - 33.5 inches Please note:  All of the binders in this collection are being discontinued to make room for new stock. These products are FINAL SALE and will not be eligible for exchange, return, or refund. *Provided for reference. Each body is unique and even people with identical measurements may best fit different sizes. Email our care team at support@gc2b.info  or check out our sizing page for an instructional video and more information.