Size Guide Junior: Finding the perfect fit for little feet

Kids grow fast, and so do their feet. That’s why finding the right size matters, and why a shoe size is only a starting point. The way a sneaker fits also depends on the shape of the shoe and the materials it’s made from.

At Mercer, every model is made in one dedicated factory, so you get a reliable fit across every pair.

Our junior size chart (EU 26 to 30)

How to find the right size

Measure both feet. Have your child stand up straight and measure from heel to longest toe, preferably later in the day. Choose the size based on the larger foot.
Add room to grow. Add around 1 cm for movement and growth.
Check the fit notes. On every product page, we share whether a sneaker runs smaller, larger, or true to size.
Check regularly. Little feet can outgrow a size within months, so measure again every now and then.

Still unsure? Send us a message and we’ll help you find the perfect fit.

VIEW all