What advice would you give someone starting this project?
Fusing the interfacing on the back of the tee shirts (to keep them from shifting and stretching) takes a LONG time. If you are going to do a lot of them, it is worth getting a steam press.
What you will need
Used tee shirts
Q&A with Villagequilter
I am just starting off, how big were the squares used from the t-shirts
Each block is a different size. I play with the placement then determine what size I want to cut them. I put them together like a puzzle.