3 mini charcoal pencil, 4cm x 13cm sketchbook. Took me a while to get used to the books, they were a gift. Now, I like the small space. Helps me focus.
So that's about 1 1/2" x 5". Interesting--3x5". Yes, in that folded format, certainly would help with either focus, or, if it were me, probably teach me about frustration! And you're using charcoal! Wow. Definitely a good place for thumbnail sketches, even detailed areas. compact enough for a pocket or purse. Nice gift.