H&M slim fit gray adjustable waist denim jeans

H&M slim fit gray adjustable waist denim jeans. Lightweight and stretchy. Hard to find size and length for a teen who has a really small waist. Bought for my son who is always in between kids and men’s sizes because he’s very slim but approx 5’8.5. I bought too many pairs thought and he stopped wearing jeans to school. NWT - no flaws. Smoke free home