These well-made notebook covers are built to take years of use and abuse! They can be used for a variety of purposes including calving books, shop notes, a mini journal, or just to have on hand for writing down ideas. I have one that I use as a calving book, and it works great! They are made of quality leather and completely hand tooled and hand sewn right here on the ranch. They fit a standard 3 1/4"x 4 1/2" mini composition notebook that can be purchased in most stores that carry office supplies. (No need to hunt down special notebooks to refill it. I'll even include one to get you started!) These measure 5 1/8" tall x 3 3/4" wide.