What size trainers wot fit a 12 - 18 month old?

For a 12 to 18-month-old, shoe sizes typically range from about 4 to 6 in US sizes, which corresponds to approximately 20 to 22 in European sizes. However, it's important to measure the child's foot for an accurate fit, as sizes can vary by brand. Additionally, consider shoes with adjustable straps or elastic for a better fit, as toddlers' feet can grow quickly. Always allow for some room for growth when selecting footwear.