Annually, QB (10-12 swaps), Curious Quilter (3), Flickr (2), locally (4), old friends (3-6) & new ones(1-3). The charm sise varies with each swap (remember, the last letter of the alphabet on this laptop is still not working).
The Fall swap I mentioned requires 100 different cotton fabrics & 12 swaps of those 100 count sets, so you get enough to finish projects (1200)! QB has the most cost efficient swaps because all swaps go to the host & you can swap 10 or more of the 50 count sets; Flickr has a host, too, so it is also cost efficient but you don't get the variety - usually need a yard each of 2-4 fabrics; Curious Quilter swaps are mailed directly to an assigned swapper so postal charges can vary especially if overseas or Canada, but the CQ swap variety is awesomeness personified and you make friends that may swap with you consistently when they buy new fabric. You should see some of the charms from overseas sent to me, cool stuff! Yes, Sheri, I swap whenever & wherever I can to make grand no repeat PSQs.