Well I am very sad to say I got my blocks all made today...supposed to be 3 1/2"x6 1/2" unfinished...so that should equal 18 1/2" when sewn together right?!?! I sewed together and put beside the center block and the strip of blocks is too short.
I have no idea what I did wrong! I will be in my craft room tomorrow morning trying to figure something out! I really don't want to have to start again, but may have to...