Measure your child's feet standing up, with their full weight on the floor, ideally at the end of the day when feet are at their largest. Place each foot on a sheet of paper with the heel against a wall, mark the longest toe, then measure heel to toe with a ruler. Measure both feet and use the longer one, since most children have one foot slightly bigger than the other. Match the result to ECCO's kids' size chart. ECCO kids' shoes are built on an anatomical last shaped to the natural form of a growing foot, so the measurement translates into a consistent fit across styles.

Leave roughly a thumb's width, about one centimetre, between your child's longest toe and the end of the shoe. That gives the foot space to move and a little room to grow into, without being so loose that the shoe slips or trips them up. Shoes that are too big make the foot work to hold them on and can change how a child walks, so more room is not always better. ECCO kids' shoes use FLUIDFORM technology, which bonds the sole directly to the upper so it flexes with the foot and keeps the fit secure as your child moves.

Kids' feet can change size every few months, especially in the early years, so it's worth checking the fit regularly rather than waiting for shoes to feel tight. For younger children, measuring roughly every three months is a good habit, and for older children every few months still works as growth slows. A child won't always tell you when a shoe is too small, because young feet adapt around it, which is why measuring beats guessing. ECCO kids' shoes are built on an anatomical last that supports the natural shape of a developing foot, so each new size keeps that support consistent.

UK and EU kids' sizes use different numbering, so the same shoe carries two different numbers depending on the system. Our kids' size chart lists every kids' size in both UK and EU side by side, so you can convert an EU size into UK or the other way round by matching your child's foot length in centimetres. Always size by the actual measurement rather than the number your child wore last, as feet grow at different rates. Once you have the length, ECCO's anatomical last gives a consistent fit in that size across our kids' range.

If the shoes don't fit when they arrive, you can return them within 30 days for a full refund, and returns are free during that period. ECCO kids' shoes are engineered to feel comfortable straight away, with FLUIDFORM construction and PHORENE cushioning that give lightweight support and natural flex from the first wear. Try them on indoors on a clean, dry surface so you can check the fit and still return them if needed. If a shoe pinches or causes discomfort rather than simply feeling snug, it's likely the wrong size.