That is where you have the X and O blocks? The subunits are the same size in both blocks, but the O's have two ends with background, while the X is made with 1 background.
So the answer is the same size as you used before.
I do like that pattern, it is one I've made more than once
Edit: Wait -- I took a look at a quilt. Subunits are the same but just turned differently.