really nice bikini fit well wish the bottoms were bigger for the junk in the trunk

So I am trying my hardest to get this suit up to a five star! It's a great design for smaller boobs and big butt, but like other have said; wish you could order separate sizes. I'm 46 years, 5'8", 165lbs, 34 30 41. I ordered a size 16 and it fit ok- really big in the top and a bit small in the bottom. I then ordered a size 10 and exchanged the 16 for an 18. I have received the size 10 and the top fits well and the bottom is tight. I'm waiting for the size 18 to fit my butt to have my perfect suit (I hope); size 10 in top, size 18 in bottoms.