Great quality period panties - not bulky at all. I was not sure which size to buy so I got both the small and the medium. They do NOT run small like a lot of other brands. I looked at the brands sizing chart and measured my hips. I am a 38.5” hip (which would mean that I am a medium) and I would say I fit comfortably in the small, the medium is a tad bit large. I am very happy with the level of absorbacy. I used them for a very active week of skiing and I didn’t have any issues with leaking. I highly recommend these panties and will be ordering more.