Waist Trainer Women Corset Sauna 2XL fits like m/l

Waist Trainer Women Corset Sauna Sweat Weight Loss Body Shaper Yoga Slimmer Belt. Color Grey, Size womens 2XL !!FITS MORE LIKE A medium or Large!! I bought this new from another app but it didn't fit me at all, couldn't even zip it. I'm normally a 2XL but it fits more like a M/L would. The last photos show it on my 17 year old who wears a Small and it was just a little loose on her but with the Velcro fastened it fit but still had room to tighten more. Condition is new.