Pick the ideal Crocs size: Crocs use US sizing on the sole; UK sizes follow a one-size conversion (e. G. US M5 | W7 corresponds to UK M4 | W5), If you typically wear a half size, we recommend you order a size up Pick the ideal Crocs size: Crocs use US sizing on the sole; UK sizes follow a one-size conversion (e. G. US M5 | W7 corresponds to UK M4 | W5), If you typically wear a half size, we recommend you order a size up Easy to wear Original Croslite foam cushion.