My wife is 5'7", 125 lbs. Some of the regular thongs in XL fit her, but others have not so she wanted to go with the Whaletail Tie Side Thong. She purchased this last one; Berry Paisley in XL. She absolutely loves them. She now owns 5 of the Whaletail and 5 of the regular thongs from Coqueta. Love Coqueta!