These ski pants are a high quality item, they have part elastic in the back of the waist that makes them very comfortable, the sizes given below have been measured both stretched and unstretched, obviously if you measure on or close to the stretched limit, then you may need a larger size.This fantastic pair of ski salopettes are made from Hydropile XPro 3000 a high performance material.The Outhorn Womens Girls Ski & Snowboard Short Leg Pants Trousers Features:Critical Seams are taped to ensure water resistanceRemovable elasticated bracesElasticated waist with velcro side adjustmentThis garment is windproof too2 Side Zip pocketsArticulated knee sections gives you a good range of movementLeg snow gaiters ensure no snow get up inside your trouserZips at bottom of legs giving a snug fit around your ski bootsSIZE GUIDESize      Waist unstretched to stretched max     Inside Leg            X-Small               26 inches to 30 inches max               29.5"