My child used these for a competitive swimming course. I am selling them because I bought a different product. They were used for about six months. There are some minor scratches, but they are still in good condition. Size S Suitable for those with feet around 23-24cm. No name written on them. - From the following website - Designed to fit the right and left feet respectively, these fins have an open heel type that increases ankle flexibility. The short blade increases kick frequency, and the blade's angle generates propulsion. By wearing them, the load is greater than kicking with bare feet, so they can be used for training to strengthen the lower body, or for practicing to check form because it's easier to feel how the water is caught during kicking compared to bare feet. They can also be used for training all swimming strokes. ◆ Shipping From an eco-friendly perspective, we will ship with simple packaging to the extent that it does not affect the product. ◆ Notes ◆ Product photos are taken to match the actual colors as much as possible, but please note that the colors may differ from the actual product depending on your monitor settings. Please feel free to ask any questions before purchasing.