My son seldom get jeans that perfectly fit. The biggest problem is that they are usually too long. you know，Long pants make children with limited mobility。I never go to store to redo the hem, it’s too expensive to do a little change, so i just live with it. I found a tutorial to change hem jeans fast and easy, It sounds reasonable.
Step 1: put the jeans on, find where you want your jeans to lay and pin it. Roll the jeans up so that the original hem is slightly above that mark, and pin it.
Step 2: Sew right next to the original hem
Step 3:cut it off
Step 4: unroll it and iron flat.
Everything is done, put on again, perfect