The size is 28cm and they've been used about 5 times for short-distance running. They were run on the grass in a park, so there's some dirt, but it will probably come off if washed. Blue running shoes with a lightweight cushioned sole and mesh upper. - Brand: New Balance - Color: Blue - Model: Running Shoes - Design Features: Mesh Upper - Sole Material: Lightweight Cushioned Sole Thank you for viewing.