[quote=MTS]It's for a paper piecing class, right?
Here's a picture:
http://www.buy.com/prod/add-a-quarte...217369647.html
It also comes in a 6 inch length, which might be easier to deal with depending on the blocks you're making.
It's a fabulous little notion to have, and I use it ALL the time when I'm paper piecing. [quote]
I have this one in the link. I bought it at my LQS but I sure didn't pay that much for it. I use it all the time to check my 1/4 inch seams on blocks of all types. It's wonderful if you are paper piecing but it's even better for double checking or marking seams on Y seams, too. It was worth the investment I made of about $5.95.