I accidentally purchased the exact same fins, so I'm selling these since I'll be using the ones I already have. I can easily dive about 15 meters while freediving. You can get a lot of speed if you kick with power. 【Product Information】 * Brand: SEAC * Model Name: TALENT * Type: Long Fin / Full Foot Type * Uses: Spearfishing, Freediving, Snorkeling 【Size】 EU 41-42, Japanese size 26-27cm I usually wear 26.5cm shoes, and they fit perfectly with 3mm diving socks. 【Condition】 ・Number of uses: About 3 times ・Condition: There are some scratches from use on rocky areas, but there are no cracks or damage that affect use. 【Features】 • Designed to be slightly shorter than regular long fins, making them easy to handle in shallow water and rocky areas. • Designed to be relatively easy on the legs, making them easy to use for beginners to intermediate users.