Runs big!! Haven't put it to use yet, but the Large will be really baggy on my 12 year old (58 inches, 70 pounds)... At least he'll get a couple of years out of it, but hopefully he doesn't look silly on the slopes.Had to check sizes at 686 website, product is still pretty big, but I knew the smaller size would have been too small based on the measurements.Our junior shredder asked for bibs over ski pants. He is very lean and tightening his waistband on pants would leave bunching and bulk. He loves these. They are easy on off, soft fleece lined and insulated in the seat and thighs. He skis advanced runs and jumps and being comfortable is important to him.Perfect ! My son wanted them for snowboarding. He wore them and loved them , no problems . Style is perfect and kept him warm and dry .My son loved them!