Our soccer kids love these pants to warm up in and wear for every day use.  The sizing for Adidas runs large when compared to other brands.  My son, who just turned 10 and is of average height and weight for a 4th grader, fits perfectly in size youth small (see photo). He typically wears size 10 or a medium in regular clothing.  My 12-year old daughter, who typically wears size 12/14 or youth L/XL, fits perfectly in the youth medium.  We originally bought size youth large for her but she was swimming in them.  These pants fit close to the body with just enough room for a pair of shorts beneath.  The part of the leg from knee down fits snug and has a zipper at the bottom of each leg for easy removal over their cleats.  The stripes run down the side of each leg to the knee.  Both kids love the way they fit and feel and have already asked for an extra pair to wear to school.  I paid around $25 for them on Amazon, which is a steal compared to other Adidas pants I've purchased.  We'll definitely buy more!