I have been using the Watercolour Notebooks from Moleskins and I love them — to paint, draw, muse and sketch on– maybe this is an expensive way to use them but I like regrouping everything in one place. The size of these booklets are 21 x 13 cm (8.25″ x 5″) with 72 pages. Sometimes I reserve both opened pages for one drawing, and then it doubles in size and some other times I test out my sketch on the facing page and finish on the other page. Quite nice.