Here are the files I altered for a OSW with 15 cards. I used the original measurement layout by
Mae Collins but changed it to inches instead of cm. And then because I didn't want to do complicated calculations with my paper trimmer, I rounded all of them to .25 inches. A few of the layouts were accidentally changed while I was constructing the cards, so I did some sketch mockups. (I can't figure out what's wrong with my scanner and why everything I scan comes out grainy. If I fix it, I'll repost these with crisper images...)
Here's my sample.