DODOING Waist Trainer Corset Premium Woman Waist Cincher Body Shaper Belt 90% polyester Please choose it from our Size Chart located on the left of the product image.If you actual size is between two size,we suggest you choose the big size. Material:90% Polyester and 15% Spandex; Height:25cm 4 Spiral steel bone,which is the fins material inside the corset.It's flexible and durable,as soft as plastic bones,can bend easily butrecover quickly to origin Made from stretchable, breathable, and lightweight materials, seamless technology, no-trace, comfortable, suitable for all seasons We Ship it by ePacket, usually 7-15 business days