Our Betty Crocker cookbook was falling to pieces. My wife said we should just buy a new one, but what if they changed some of the recipes? And what about all the notes in the margins? And the sentimental value of the food stains on the pages?

The binding is about 1-1/8" diameter, the rings are ¼" wide and spaced 5/16" apart. There are 16 rings, for a total spine length just over 9 inches.

I printed this in PETG, and the rings are intentionally a tight fit into the spine. I suggest you pre-fit them because it only gets trickier when the pages are in the way. The tiny notch in the spine indicates the bottom, and the bumps on the rings face up (away from the notch).