Prism99

You can adjust the size of the center square, I think, to use 2" strips and end up with a finished block size of 12". I might try to do this in EQ7 later on to see what happens.

I have never needed to paper piece log cabin blocks, and they come out fine. It helps if you starch your fabrics before cutting and square up regularly. Some people will make the last round wider so that the block can be squared up at exactly 10.5" each; typically any small variations in that last round will not be noticeable.

Edit: I tried jotting down on a little notepad, and have had only one cup of coffee so far, so don't trust my judgment. However, looks to me as if 3 rounds around a center square will be 4.5" per side (3 rounds at 1.5" each), so 9" total finished, or 9.5" total unfinished. If you add a 1" finished square to the center, that makes a block of 10.5" unfinished, which will finish at 10". This means you can use 2" cut strips for the rounds with a 1.5" cut center square.