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, book spines, covers and signature thumbnails; and browser windows and banner ad spaces. A 16-page reference section provides essential information on a range of topics, from international paper sizes and digital formats to measurement conversion tables. Plain paper and graph paper, signature sheets and a notebook area offer extra space for ideas and thoughts.