XS S M L XL Bust width, in 17.25 18.25 19.25 20.25 21.25 Under-bust width, in 14.00 - 15.50 15.00 - 16.50 16.00 - 17.50 17.00 - 18.50 18.00 - 19.50 Waist width, in 12.75 13.75 14.75 15.75 16.75 Hips width, in 18.25 19.25 20.25 21.25 22.25 This full-coverage bikini set combines an athletic style with high-end comfort. Thanks to its 4-way stretch fabric blend (82% polyester, 18% spandex), it delivers unmatched comfort for peak performance in the water. Each set comes with a high-waisted cut for timeless style. .: Material: 82% microfiber polyester, 18% spandex .: Durable and stretchy fabric (7.5 oz /yd (250 g/m)) .: Comes in a set of bottom and padded top bikini parts .: Sewn in size and care label .: Seam thread color automatically matched to design (black or white) .: Assembled in the USA from globally sourced parts