This is my Urban Sketching Sketchbooks numbers 6 and 7. It’s 10″ by 7″ (26cm x 18cm), which is a bit smaller than A4.
The paper is Fabriano Artistico, with deckled edges.
The cover is a sort of leather-look man-made substance. It is tough and damp-proof. The bulldog clips leave an indentation in it, see the lower side in the picture below. The Etchr Lab series offer several “perfect sketchbooks”. This is the “Signature Series” , which are the only ones so far that are portrait orientation rather than square or landscape. This was a “limited edition”, shipped from China.
For posts using this sketchbook see, for example: