I'm visiting my grandparents in Sarasota. My grandma is 83, grandpa 89.
Recently they hit Dillards for new clothes, grandpa had zero interest in using a fitting room. Accordingly, he measured his waist and inseam with a tape measure and selected pants that matched.
36" waist, 30" inseam.
As you might expect, they didn't fit.
Getting old can't be easy, but it's better than the alternative.