“I’m generally a size 10.. I ordered my Modibodi period undies in size 12/ USA medium. I’m really disappointed as they are SO tight. I guess it has a lot to do with the elastic banding around the top which pulls into the body. I feel like there should be a note with sizing for the underwear that the elastic banding makes the underwear more tight than underwear in that sizing would usually be. Which is the last thing you want when you’re bleeding!”