Vintage Lee jeans

Vintage Lee jeans Distressed back side(see pics) Very loved and worn but still have life. Size 31. But I’m around 28-29 and they fit me perfect in the waist but the thigh area is tight. But I do have bigger thighs. NO stretch. 100% cotton. Light stains in the knees( just how they came when I bought them) I’ve not worn them out just tried them on.