Vintage Canvas Drawstring Pants Natural Cotton Unbleached Comfortable w/Measurem

Unstructured canvas pants in a natural unbleached cotton. Probably martial arts - karate pants although from an artist's estate (stored with painters aprons & smocks). Comfortable, washable. No fly, zipper, or elastic. Step into with drawstring waist. Condition good, small storage spots - may come out with stain treatment - see pics. Slit repair, well done. Washed and dried. All original. Estimate 80's, could be earlier. Knee patches. Length 38", waist up to 40", rise 14", inseam 29", Hips 60". Pair B, 3 available