Reincoat Lite is designed to be oversized to go on top of layers, competition coats and protectors. Sizing is based on rider’s height and not chest size. Below is our Equicoat Kids size chart. Please note Equicoats are designed to be oversized and sized based on rider’s height. Size XS SMALL Age 5-8 Years 8-12 Years Recommended Height (ft) 3'7'' to 4'2'' 4'3'' to 4'10 Reincoat lite kids