Where can I buy the worlds most amazing index cards?
The Container Store carries the exact same cards as in your link and I’ve purchased the affinity card sized ones (also made by Kokuyo) at Kinokuniya, a Japanese bookstore chain (scroll down on the page to see the west coast locations, in English).
I’ve made my own versions of these. I buy a big box of blank business cards (also from Bob Slate in Cambridge, MA!). Then I punch holes in them (this is a bit of a pain; it could probably be done en masse at a Staples or something.) Then I buy the binder rings (which they sell at Bob Slate in varying sizes, 50 cents a piece or something. I imagine you could find them at any Staples, too.) This lets me make truly massive quantities of flash cards, without worrying about the expense.
MindBinders seems to be the big seller of mini ring-bound note cards. I can’t find a home page for the company, but there are a lot of small online shops out there selling their products. This page is for a whole box of them, but I am sure if you search around you can find a reputable shop selling them individually.
Success! I followed I_love_the_rain’s suggestion and headed to the UC Irvine bookstore (which was open today, surprisingly!) where I picked some of the Myndology cards suggested by Stacey and B(oYo)BIES – they’re not exactly the same as what I wanted, but they’re close enough – they’re held closed by a little cardboard latch…thing, and they are the perfect size. You can order online at the Myndology website; the ones I got were 1″ by 2″. Jamaro, your Kinokuniya suggestion was just in time – I checked back right before I left the house, and went by their Costa Mesa store on my way back from UCI and they had the ones in your photo as well as at least 5 or 6 other types, though the only one with a cover/closure system was the wrong size for what I wanted. Let’s hear it for southern California being such a hotbed of Japanese-inspired stationery innovation! For posterity,