As pointed out by a few other buyers already, the large "A5" cover does NOT fit A5 notebooks. A5 paper is 148mm (5.83") wide. The supplied notebook is 5" wide.
I took photos of a slightly undersized 140mm wide A5 notebook (which doesn't fit) next to the cover and supplied notebook.
I took photos of a slightly undersized 140mm wide A5 notebook (which doesn't fit) next to the cover and supplied notebook.