This ruled notebook has a hard cover that helps protect the inside pages from damage, and the spiral binding allows for an easy page flip.
BT21 Music A5 ruled spiral notebook
8.3" X 6.2" X 0.4"
The notebook is nice, and the front and back cover are made of a thin but sturdy cardboard like material. It's a little smaller than I expected, but as I'm just using it for personal notes, that's fine. The line spacing is quite similar to American college rule, but a little bit wider.