Blurb's selection of sizes caters to a range of bookmaking possibilities, especially photo books and trade books. For photo books, choices include Mini Square (5x5 in., 13x13 cm.), Small Square (7x7 in., 18x18 cm.), Standard Portrait (8x10 in., 20x25 cm.), Standard Landscape (10x8 in., 25x20 cm.), Large Landscape (13x11 in., 33x28 cm.) and Large Square (12x12 in., 30x30 cm.). Trade book options are available in three sizes: Small (5x8 in., 13x20 cm.), Medium (6x9 in., 15x23 cm.), and Large (8x10 in., 20x25 cm.). For exact dimensions, visit our book sizes and specifications page. The trim size you choose for your book will influence cover options and paper types while shaping the overall presentation of your content.