1、Size reference: XS/M: 4-8 (US), 36-41 (EU), 22-25 (JP) / ML/XL: 9-13 (US), 42-47 (EU), 26-29 (JP). 2、Sturdy side rails to channel the water \u0026 pre-bent design for a natural kick. 3、Soft foot pocket with easy-to-adjust strap. Perfect for snorkeling or swimming. 4、Soft short blade and elastomer foot pocket able to be put on quickly and easily. 5、Accommodates 4-5 consecutive sizes and can be worn over thin footwear. 6、Soft foot pocket with easy-to-adjust strap. Perfect for snorkeling or swimming. 7、Size reference: XS/M: 4-8 (US), 36-41 (EU), 22-25 (JP); ML/XL: 9-13 (US), 42-47 (EU), 26-29 (JP). The fin is the perfect blend of style and function. Stylish adjustable heel improves comfort. Features: Size reference: XS/M: 4-8 (US), 36-41 (EU), 22-25 (JP); ML/XL: 9-13 (US), 42-47 (EU), 26-29 (JP). Sturdy side rails to channel the water & pre-bent design for a natural kick. Soft foot pocket with easy-to-adjust strap. Soft short blade and elastomer foot pocket able to be put on quickly and easily. Accommodates 4-5 consecutive sizes and can be worn over thin footwear. Perfect for snorkeling or swimming. Specifications: Brand: WHALE Type: Snorkel Fins Material: PP + TPR Color: Black / Red / Blue / Yellow (Optional) Size: XS-M / ML-XL (Optional) Fin Size: 355 * 180mm / 14 * 7.1in Package Size: 38 * 19 * 9cm / 15 * 7.5 * 3.5in Package Weight: 981g / 2.16lb Package List: 1 * Pair of Fins Notes: 1. Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks. 2. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. 1 * Pair of Fins Notes: 1. Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks. 2. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.