Very versatile pattern!
If using 10" precut squares:
You will need 40 squares and an accent fabric. Start on Page 1 of the pattern.
If using panels, T-shirts, etc:
The Block Talk pattern adjusts to whatever size you cut the center of the block. Start on Page 6 of the pattern. The center of the block can be any size as long as they are all the same size. Pattern includes a link to a web based interactive calculator to help you figure out how large your finished quilt will be, cutting sizes, and fabric requirements. You can even add a border!