Choosing a Size for the Disappearing Nine Patch BlockWork with any size squares you like, just remember that the block will be sliced in half twice -- once vertically and once horizontally. Here's a look at the results of using a few different square sizes for parent blocks:
- 3-1/2" parent squares: daughters finish at 4-1/4" x 4-1/4"
- 4-1/2" parent squares: daughters finish at 5-3/4" x 5-3/4"
- 5-1/2" parent squares: daughters finish at 7-1/4" x 7-1/4"
Again, any size squares will work -- if the quilt will be constructed entirely of same-sized daughter blocks, they'll all match in size as long as you sew and cut accurately.
Squares do not have to include a fraction. Do you have a collection of 5" x 5" fabric squares, either purchased or received in swaps? Perfect -- daughters will finish at 6-1/2" x 6-1/2".
Here's a formula that will help you understand the finished size of daughter blocks:
- Divide a parent's finished size 2, and then subtract 1/4" to find the finished size of each daughter.