Do mens hips widen or expand as they age into their mid 20s?

I know I’ve gain some pounds, but I can’t help the overall feeling that my hips have expanded or something. Am I just in denial? I’m a beefy short stocky dude, but I used to be able to wear size 30 waist no problem, then two years ago I started doing 31 waist and those were extra loose. Now, almost out of no where 31 feels tight! And I know it’s not my jeans because I hang dry them and cold wash only.