What size bike should I get for my kid?

When choosing a bike for your child, consider their height and age. Generally, a 12-inch bike is suitable for 2-4 year olds (28-38 inches tall), a 16-inch bike for 3-7 year olds (38-48 inches tall), and a 20-inch bike for 6-10 year olds (48-56 inches tall). Make sure the child can comfortably reach the pedals and handlebars while sitting on the seat.