A sketchbook notebook and reference book in one Sizes May Vary is a unique working tool for graphic designers and students. The sketchbook area provides a space for sketching and visualizing containing more than 200 pages of thumbnails and scale line drawings of commonly reproduced formats including stationery sets letterheads business cards and compliment slips; envelopes mailers and postcards; CDs and DVDs; jewel cases and digipacks; posters and billboards; and browser windows and banner ad spaces.