Sold as a set of two pairs. I'm not really considering selling them individually. I didn't wear the sneakers much, so there isn't any noticeable dirt except on the soles. If your child's foot is around 12cm, the sandals can be adjusted with the straps, so they shouldn't be too loose. They open completely, making them very easy to put on and take off. And they never came off unexpectedly. The sandals have some scuffing and discoloration where the feet were, but they should still be fine for another season of wear. There is some yellowing where the rubber soles are attached, but it probably won't be noticeable when worn. I do not have any pets or smoke. Please refrain from asking for a discount.