10. This is how it looks when turned right side out. Kind of poofy at this point.

11. Use a pointy object (but be safe!) to push out the corners to a sharp point. I use a small paint brush handle for this since it has a slightly rounded edge that won't spear through the corner.

12. Here you can see the 2" slit that we turned the block through. Some people like to hand-stitch this closed, others don't bother since it will be beneath the window fabric and won't be seen. I just leave it as is and don't worry about it.

13. Steam press the blocks flat and try not to stretch them out of square.

14. Now we need to fold the corners into the middle like this and press the edges. I like to use pins to hold the corner down into the middle while ironing to avoid steam burned fingers!

15. After pressing, lay the blocks in a stack while you continue pressing. I like to lay them with the points down so that while they cool they will hopefully cool flat rather than with the points sticking up.

16. Now, we're ready to stitch the blocks together. Begin by laying two blocks side by side.

17. Fold the right block under the left block while holding their common sides together.

18. Stitch across the two blocks to join them, using the visible ironed line as a guide.

19. All the way across now, so clip the end threads.