I bought the OOSC Powder Hound one piece in L. I am 5'71/2", 155 lbs, size 36B bra. L was huge! It fit my 6'2", 210 husband just right. I tried M, still big. Crotch hung down 3-4 inches, waist too big, arms too long. I wanted extra room, not this much. Ordered S from another vendor, too small. Just needed one more inch all around. Manufacturer's sizing not right. If fixed, they could succeed well.