answer:If you’re in San Francisco, Kelly Paper is the place to go – that’s where we got all of the paper for our wedding invitations, programs, etc. I’m pretty sure you can buy from them online as well, but if you want to check out the paper before you buy, they have several stores in the Bay Area, and they’ll sell you a few sheets as samples to send to your friends… The Paper Source is also a great resource for all different shapes, sizes and colors of card stock. There’s also several of their stores in the Bay Area, so you can go buy some samples there too…