Anti-slip for snowy/icy roads, set of 2 Overall length: approximately 27cm Length from the bottom of the hole to the bottom of the other hole: approximately 23cm A 23cm indoor shoe fit, but a 27cm shoe did not. Since it's rubber, it stretches a bit, so I think shoes around 23cm, plus or minus 1-2cm, will fit. These are anti-slip devices to be attached to your sneakers. Received in 2018 and never used. The bag is damaged from long-term storage, but the contents are not damaged.