Somehow the name boyshort made me think more "shorts" rather than "briefs" (which would have fuller coverage), so I ordered bikinis. In retrospect after looking more closely at the boyshort style, I think they would be perfect. The bikinis definitely ride up and I feel like I am regularly having to adjust them. (I don't necessarily think that's an issue with these specifically, I think it's a problem with all bikini style undies.) Before ordering I consulted the size chart and I measure a M in the measurements, but I always wear 10-12 pants, which they associate with a L, (as opposed to the 6-8 pant size they show for the M.) And I always wear size L undies too. So I ordered several L and one M thinking I'd try one of each and decide before wearing all of the larges. Especially since the descriptions say they will stretch out a bit after use. Although I paid for expedited shipping, they didn't arrive as promised, and I had to leave for a trip, so I just took all the larges hoping for the best. They fit fine other than the riding up issue. When I got home, since the larges were fine, I decided to exchange the unworn medium for another large. They sent the other large, but told me to keep the medium and share with someone. So I decided to go ahead and test it for size since just so I would know for sure. I had the half hope that the medium would fit more snugly and not ride up. But it still does. I honestly can't tell a huge difference between the two sizes in the butt. The…