Curved-waist cheeky bikini bottom in cloud meadow floral

I’m 5’5” 115lbs 37” hip with flat tummy and wear a small in underwear so the small should have fit me perfectly but it didn’t. The small was so sloppy around the hips and baggy around the bottom. It looked more like a soggy diaper and was so wide that the sides easily came up to the base of my rib cage. I like a high cut but that’s a bit much. If you look at the model online you can clearly see it’s sloppy on her tiny bottom as well. I’m ordering the XS to see if that fits any better. After paying for expedited shipping I didn’t get to enjoy my new bikini in Cancun which is a serious let down.