Loriet Boys Madrid Performance Shorts 100% Polyester Side Pockets and Elastic Waistband Fits as follow: S for 4-5 year olds, M for 5-6 yo; L for 6-8 yo; XL for 8-9 yo Double-Layered 100% Polyester Fabric Contrast Piping around side and back Anti-Microbial, Wicking