Space Dye Under Lock And Key Minidress

I’m a standard 24 across the board and sized up to a 4x even though the sizing chart said I measure at a 3x. So glad I did because the 4x is so very tight through the neck and chest. I could barely get my head through the straps, the neck digs into my clavicle, the straps dig across my shoulders and back and it’s very tight in the bust. And I’m not particular busty so not sure what’s up with their sizing/cut. The fabric is thick and compressing which I like and it’s long enough, hits mid thigh (but no shorts built in). Skirt has an a-line flare which is flattering. Will be returning because it feels like it’s strangling me at the neck.