I also had the same problem but came up with a different solution - small zipper top bags that are found in the bead department of the craft store. I use the two smallest sizes. I take the buttons off of the cards, cut the size information (sometimes the Manufacturer also), and place them in these bags. Because they are in a clear plastic they can be seen from both sides and they slide against each other very, very easily without 'catching' on each other. Toss them in a clear plastic shoe box. This makes it a breeze to 'shuffle' through them to locate the buttons I need.