I know! The size difference in some stores is ridiculous!
I laughed as I love Primark pj bottoms for lounging around the house and I bought 8 pairs of size 16-18 (they're stretchy, cotton material) When I got them home and tried them on they were too big! I couldn't believe it! A size 16-18 being too big for me! Amazing! I took them back and changed them for 14-16, and couldn't remove the grin from my face while I was doing it. I only ever wear 14-16 in my dreams! Now, if I was to buy 14-16 pjs in Marksies they wouldn't even go over my ankles! Crazy stuff. We should start a campaign!