Crocs use US sizing on the sole, with UK sizes following a one-size conversion. For half sizes, go up to the next dual size. Junior UK sizes three and up can transition to adult sizes. Customise your pair of Crocs with Jibbitz charms inserted into the ventilation ports for personalization. These Crocs are incredibly light, easy to wear, and created with Croslite foam for iconic Crocs comfort. The flexible material ensures a comfortable experience.