Lively Swim The High Waist Bikini Bottoms. This is available in a size Small & Medium. I have the matching top shown in the pictures as well in Large. These are brand new with tags and sanitary sticker. Rock this retro high-waist cut and mix-and-match with all your favorite tops. Retro high-waist cut. Perfect to mix and match. Back coverage that’s not too big, not too small. Fabric: Outer: 80% Nylon, 20% Spandex. Lining: 85% Nylon, 15% Spandex. Recommended Sizing: S (4-6), M (8-10).