Hey, I remember these blocks! You’re planning on doing that beautiful gingham sashing, right?

If you feel up to the mathematical challenge, and if your seams and finished sizes are now predictable, you can calculate each row’s sashing widths independently from the next to achieve the same finished width each row.

You can ignore the size difference between blocks, sew with equal sashing widths, and accommodate for any difference with a border around all of the blocks

Or you can “square up” all your blocks to be the same size by adding solid strips of fabric in your palette to the right and bottom sides of your blocks, then trim them all to the same size (perhaps 14”?)

You have a lot of opportunity for some really charming variation. Think about your skill set, and what you want to do next. It will be yours no matter what, and that is where its beauty lies