Block 6 of Jelly Roll Sampler

In working on the Jelly Roll Sampler, I put all the blocks together to see where I needed to go color wise.  So far, even with block 6 I made today, it's a very dark quilt.  I was thinking I could use some extra blocks from a block of the month from Quilts Bayou.  But after finding them, I realized they were 9 1/2 in. blocks and the JRS blocks are 12 1/2 in.  Don't think so!  Guess I'll do more thinking about that.