Way too small, not accurate sizes! I am still waiting to receive my credit code. After sg

I LOVE my fuscia jumpsuit. However I bought both, the fuscia and the turquoise, same size in both, and the turquoise is SIGNIFICANTLY smaller. I can barely get it over my butt, and forget pulling the straps over my shoulders. I am so confused as they are supposed to be exactly the same. I was just going to exchange it for a size larger, but there isn’t one :(