The image on the right is a product from Malaika, and I wore it once outside. It has a zipper in the back, so it fits securely without slipping off. It's flat and safe, with no heel! It's 24cm, but can be used by those up to 25cm. Image on the left: I tried it on indoors once, but the size doesn't fit. I usually wear 24cm, but it seems small, so I think it's good for those who usually wear around 23cm! It's a sandal. It has excellent cushioning, so you can wear it without your feet hurting. Discounts are not offered as stated in my profile. Both are in good condition, so it's a great deal to buy both for the price of one! Size 24