Sizing charts for kids' slippers and shoes are available online at no charge. OnlySlippers.com provides a Slipper Sizing Guide, which refers customers to check their actual shoe size. Since slippers are generally sized as small, medium, large and extra-large, the shoe size determines the slipper size needed.
HealthyFeetStore.com provides extensive shoe charts and measuring information for infants and children up to 10 years of age. The site includes specific tips related to purchasing shoes for infants, children and youth. Zappos.com also has a detailed shoe size conversion chart available. Several manufacturers of slippers (and shoes) offer sizing charts and information specific to their products.