Why is my waist measurement four inches greater now than it was in my 30s?

After two consultations hoping for liposuction or CoolSculpting, I was told by both surgeons that the baggage around my belly and abdomen was not fat but loose skin. I got a tummy tuck and was pleased with results but my waist measurement did not significantly decrease. I'm 63, the same weight and close to the same body fat percentage as I was in my 30's. My question is, why is my waist measurement four inches greater now than it was in my 30's? Is it increase in visceral fat? Do organs enlarge with age?