I bought these for the beach/pool and only wore them twice. They are lovely summer shoes and need a new home so they can be enjoyed! I’d say they run true to size and only did not work out for me because my foot is wide. They aren’t available in half sizes and I usually take size 38.5 in Hermes. I was advised to take size 38 but they are too narrow for me. They are made of waterproof TPU, which is a sturdier material than what jellies are usually made of. There is some light scuffing on the soles and a few grains of sand stuck at the bottom. Comes with box and both dust bags.