Artists, students, and hobbyists, this HIMI sketchbook is a fantastic all-around paper pad for almost any medium. The pages are a heavyweight 110.5 lb / 180 gsm mixed media paper that's thick enough to handle watercolor, gouache, acrylics, ink, markers, pencil, and charcoal without buckling or bleeding through too much (though very wet applications might still warp it a bit – that's normal). It's acid-free, so your artwork won't yellow over time. The pad size is a very popular and portable 9 by 12 inches, with 40 sheets in total. It's bound on the side with wire (spiral binding), so it lays flat easily, and the cover is a sturdy cardboard to protect your work. A nice feature is that the three open edges of the paper block are lightly glued, which helps prevent the pages from curling when you're working with slightly wet media – you just gently separate them as you go. It's a great, affordable sketchbook for practice, studies, finished pieces, or journaling. A reliable workhorse for any creative.