Traditionally, any items of school uniform are sold in a specific inch size, not by age.
If you are used to buying by age we advise that you measure your child and check the age/inch comparison size guide for each product.
Where possible, we have provided an AGE / INCH COMPARISON sizing on each individual product to help you order online.
Garment sizes in inches are a "to fit" size, therefore if your child measures a 26" chest, we would advise you to order a 26" chest, given that garments are made to fit that specific chest size. Only order a larger size if you are allowing room for growth.