The squares are cut at 6 inches and I allowed for a 1/2" seam since I pieced with a serger. I know that isn't the traditional seam allowance for quilting, but I'm not a rule follower, as you can see! I don't want the blocks smaller, so I'm not inclined to cut and re-piece the columns. The solutions I'm looking at now involve how to work with what I've got. Since this is my very first quilt, I'm resigned to the fact that it will never be amazing, but I do want to do my best.
I Googled quilt sashing and it looks like that is between all the blocks? Regardless, I don't live by the fabric store that I got all of the fabric from, so I'm fresh out of the stuff aside from the extra blocks I cut. I'm going to use those to continue the pattern down to the next row that starts and ends with the brown since I'm losing some length now with the off-setting.
The suggestion to start with the regular machine and then serge is attractive to me and something I never would have thought of. Thanks for that!
As to the comments about how the baby will like it... I sure hope so. Her favorite blankets at the moment are all minky, which is why I chose that for the backing and brought a few squares of it to the top for repetition. She loves her texture.
This is the adorable recipient, by the way!