they sent me a medium and fit so ugly

The dress is a more of a lilac color rather than a pink put it’s actually pretty cute. I’m not sure why people are saying to size up because it’s very true to size. The only thing I can see is y’all don’t know your correct size and are squeezing in mediums. but for reference I’m 185, 5’6. 34c cup. I naturally have a smaller waist and bigger hips and butt, but not a bbl and the medium fit perfectly. Around the feather part has no stretch put everything else fit as it should.