Surefit Size Chart [Kids F]This chart applies to the following Surefit styles:Lisa. Get the perfect fit every time.1. Measure your child’s foot length2. Add 10 mm growth room3. Match that to the inner length of the size you need Surefit Size[Kids F]Our Aus Size Inner shoemeasurement [mm]2911.51933012.52003113.5206321213332220342.5226353233 Surefit sizing can vary between different styles, so please use the right size chart for the style you are falling in love with and about to purchase. To make this easy, the styles are listed at the top of each of our Surefit size charts.