Ordered Tommy Hilfiger swimming shorts age 10-12 years for my slim 9 year old son. When they arrived they looked like they would fit a 5 year old. The size guide on the website is useless as it gives no measurements, just says 11-12 years is UK size LB. You cant speak to a person at USC as they dont have a phone number so rather than try to swap them I returned them for a refund and made a new purchase from a different company. Cost me £10 in delivery and return postage. Would never use USC again.