Pat's directions have the block finish at 12 x 15 using a center block 5 x 7. I decided to use a 5 x 10 center by cutting up layer cakes, so my blocks end up at 13" x 18". I also didn't use all 2 1/2" strips, but used 2 sets of 1 1/2" strips mixed with 1 row of 2 1/2" strips to give it a bit of a different look.
So let me know what you think? I think I am going to finish up more blocks and take this from baby size to bed size.