AGE WAIST INSIDE LEG  HEM (LEG OPENING) LENGTH 10/11 YRS 28.5'' 28'' 14'' 36.5'' 11/12 YRS 29'' 29'' 15'' 38'' 12/13 YRS 30'' 30'' 16'' 40'' 13/14 YRS 31'' 30.5'' 16.5'' 40'' 14/15 YRS 32.5'' 31'' 17'' 41'' 15/16 YRS 34'' 31'' 18'' 41.5'' 16/17 YRS 36'' 31'' 19'' 41.5'' 17/18 YRS 38'' 30'' 20'' 41.5'' Plus sized classic school trousers,  65% polyester, 35% viscose, Regular leg,  Pleat front Adjustable waist for a perfect fit.  Flat waistband with zip and hook and bar fasteningin & Weatherproof An adjustable waist promises extra comfort Composition 65% polyester, 35% viscose, Pocketing (pocket fabric composition) - 100% polyester, (exclusive of trimmings)