"Women's shoe size 4.5-8 and Men's size 6-7 fit comfortably wearing the neoprene socks provided inside the fin. Larger sizes do not require socks. When wearing the neoprene sock make sure the smooth side is against your foot and the fabric side is facing out. The new Adult Mono Fin easily propels and glides through the water just like a mermaid or merman Quick adjust TPE straps with quick release buckles, and rubberized fin edges for safety Neoprene foot strap patches with pull loops for comfort High efficiency water channels for add control Individual and ergonomic adjustable foot pockets Date First Available: July 11, 2019 Part Number: 24060-One-NVYROY Included Components: Mermaid Linden Adult Mono Fin Size: Adult Age Range Description: Adult UPC: 882930235444 ASIN: B0D5JHPJP1 Material Type: Plastic Sport: Swimming, Mermaiding, Monofinning Department: unisex-adult Manufacturer: Body Glove Item Type Name: Adult Mono Fin Warranty Description: Limited Sport Type: Swimming, Mermaiding, Monofinning Model Name: Mermaid Linden Adult Monofin -Caribbean Blue Package Dimensions: 23.5 x 21.75 x 2.25 inches; 3 Pounds Item Package Dimensions L x W x H: 23.5 x 21.75 x 2.25 inches Color: NAV/ROY Item model number: 24060-One-NVYROY Material: Plastic Brand: Body Glove Brand Name: Body Glove Fit Type: Regular Age Range (Description): Adult Suggested Users: unisex-adult Package Weight: 1.36 Kilograms Closure Type: Buckle"