Math help please
 

https://i.pinimg.com/564x/d7/44/81/d...9ce2ea4e89.jpg
Been looking on Pinterest again and I have a jelly roll and want to make this quilt, but use Kona Snow instead of black. What would you say the length of these sections are cut to? I know that sewn together they will measure 4 1/2" for width and that it takes 4 of these sections to make the design, but for the love of me, I can't figure out how to get the most out of my strips and have it look right.
My brain tells me length is also 4 1/2" and that means I'll get 8 out of a strip, making 2 completed designs from each strip. with scraps left over. Is this right?? I should mention that my brain is fuzzy because of muscle relaxers for a damaged right shoulder. Thank you ladies!

If you sew 2.5in print and white strips together you will have a 4.5in wide strip. Cut these into 4.5in pieces, and yes, you will get 8 units. When you sew 4 of these together, you will have an 8.5in block. Looking at your photo you should get a quilt 88x88ins. I think this is what you were asking for? Do post a pic when done, as black is not a favourite colour for me to tackle.