1. When purchasing the Adidas Originals Shell Shoes in the US toddler version, it's important to note that the sizing will be smaller compared to the adult version.2. If you normally wear a size 36.5, you might need to opt for a size 37 in the toddler version to ensure a comfortable fit.3. Choosing a size 37 in the toddler version can prevent the shoes from feeling too tight when worn.