My sister and I made a quilt for our mother. How do you make half a quilt? We divided up the quilt into 24 blocks, 18-1/2" x 24-1/2". We bought about 12 to 16 1/2 yard cuts of fabric, divided them half and used fabric from our own stashes and the chosen fabrics. The plan was to made 12 blocks each, and alternate them.
I made 12 perfect 18-1/2" x 24-1/2" blocks. My sister, bless her, made her blocks bigger than that, and each one unique and individual. I had to square them all, then trim them all down to the right size. It drove me absolutely crazy.
The quilt was a great hit with our Mom. You can't tell where my sister's blocks end, and mine begin, unless you look very closely, and even then it's pretty tough.
My sister LOVES to tell the story about how I had to trim all her blocks to size.And I still roll my eyes.
Which is why the block for Tonya is -exactly- 6-1/2" x 12-1/2".