Not quite sure what size to buy? Our Sole Sox Foot Measurer takes the stress out of choosing the right size. Measure your toddlers feet in the comfort of your own home. This tool is also great to have at home as your little babies feet grow to ensure you always pick the right size. Babies feet grow fast! Thats why we recommend checking your babies foot size every 4-6 months to ensure they are in the correct size shoes. How to use our Foot Measure Start with your little one barefoot and without socks on in the standing position Place their heel against the curved end on the foot measurer Slide the white guide slider to the tip of their longest toe. Hold the white slider in place and remove their foot. The correct measurement is the number closest to the edge of the white slider where their toe was. Chose the size on our size guide below that corresponds with the measurement. The best size for them would be the next closest size to their foot measurement. For example, if their foot measures 11cm, we would recommend purchasing a size small (11.5cm). At this age, the right size shoe is just as important as the right type of shoe. Shoes that are too big will slip off and cause your little one trip, stumble and fall. We strongly recommend purchasing the correct size for your little one, and not a larger size. Please note that the size guide & foot length does NOT represent the actual size of the shoe, it is a guide to help you select the right size. Our foot measure shows the length of your toddlers foot in CM’s and measures up to 20cm. We know how hard online shopping can be and here at Sole Sox we continuously strive to take the stress out of online shopping. That’s why we’ve brought you an easy way to measure and why we have one of the BEST returns/exchange policy in the industry.