These are GULL diving fins. The Bonito 515 are full-foot rubber fins. Because they are made of rubber, they have a specific gravity and are less likely to float up in the water, providing excellent stability, making it easier to maintain posture even when carrying a camera. Please note that there is a small marking on the heel strap. <Size> 26 - 27cm Please be sure to read the profile as well. Thank you for looking.