Great style from the 60's or 70's era of double knit polyester - plaid pants worn by men and boys ! 

Sears - "Put On Shop " quality clothing from mail order catalogs 

size 27 waist 28 " inseam -

18" around bottom of pant leg ( bell bottoms) 

clean , 

one repaired snag by back pocket as seen in last picture , initials marked on inside waistband