This is one of my favourite swim thongs that I own. I'm a 30 inch waist and a small fits me perfectly. These thongs seem to run true to size unlike other brands that can run up small. I love that this thong has a big generous pouch which allows you to hang free rarher than everything being pressed against you and flat like you get with some swim thongs, which can be rather uncomfortable. The sides and thong back are fairly chunky for a swim thong, meaning that this is a bit more modest than some, and would be okay to wear on a beach without causing too many heart attacks lol. All in all very pleased; if you like wearing swim thongs then this is definately one to invest in.