These are Adler soccer cleats. They are 25.5cm. I usually wear 26cm or 26.5cm, but these fit just right or were slightly large when sizing down. I think they will fit perfectly for those who wear 26cm or 26.5cm. I only used them on natural grass. The studs are not worn down. These are top-of-the-line, all-leather cleats. They are the "Yata-Geri" model. The edges of the toe, the inside, and the outside heel of the sole have worn due to use.