3.5" frayed denim short

J crew please standardize your sizing!! I purchased these shorts in the same size as the stacked button denim shorts. While those are comfortable with a little extra room, these I can barely zip up. I’m sitting with them on as I type this review, I can feel the waistband cutting off my middle. How can two pairs of denim shorts vary so widely in its fit?? This begs the question: Do these run small or do the stacked button shorts run big?? Otherwise, it is well made, good denim weight, appreciate the finishing stitch just above the frayed ends to keep it from unraveling further.

So cute and fit is amazing