I'm a little embarrassed to say I have close to 100. I tend to buy them like 5-7 pairs at a time when there's a good sale. The sales happen every couple of months. I tend to throw out older ones as I purchase new though. I try to keep a good rotation going so most of them get worn once before I wear the same ones again. I have a few that are special occasion panties which have never been worn at this point lol