14. Now you need to cut sashing strips to join the blocks together – you need a strip to go between each block to join them in rows – later, you’ll cut sashing strips to join the rows together. The strips need to be an inch wide and the length of the unfinished side of your block. Mine are 1 inch x 6 ˝ inches. I need 4 strips per row and I have 4 rows so I cut 16 in total.