Usaya-shaper Waist Tummy Trainer Belt Slimming Supportive Shapewear Tight Corset (2)Black) Location: CA, United States--Ship by USPS Mail Innovations,3-7 Business Days Delivery Condition: BrandAndHighQuality, New With Tags,Low Price,Best Service;Material:90%POLYESTERAnd10%SPANDEX BEFORE ORDERING: We are not standard USA size, don't use amazon size chart. Please Careful Reading Our Size Chart,Example #1: S Szie for Waist 24.5"-26.7" mean: "S size fit your Natural Waist 24.5-26.7inch" 4 Spiral steel bone, which is the fins material inside the corset. It's flexible and durable,can bend easily but recover quickly to origin. High elastic free support,helps with weight loss,reduces waist size,helps with posture Please refer to picture for detailed information and allow a little inaccuracy due to hand measure.