AI Images for Print: Bleed, Trim, and Safe Margins
Plan a postcard with separate trim, bleed, and safe areas. Work through dimensions and inspect what happens when a cut shifts beyond the artwork.
LocalBanana Blog5 min read
trim size
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8.5 x 8.5 Book on KDP: Size, Spine Width and Print Cost (UK)
Last reviewed by Robert Prime, 12 October 2026. Checked against Amazon’s own help pages: trim size, bleed and margins, paperback printing cost, paperback royalty and create a paperback cover. Quick Answer: 8.5 x 8.5 inches (21.59 x 21.59 cm) is a square KDP paperback size.
KDP Readiness Score Blog12 min readStandard Book Sizes UK: Paperback, Hardback and A5 in mm, cm and Inches
Short answer: the standard UK book sizes are A-format 111 × 178 mm, B-format 129 × 198 mm and Demy 138 × 216 mm for paperbacks, and Demy, Royal 156 × 234 mm or Crown Quarto 189 × 246 mm for hardbacks and larger non-fiction. A5 is 148 × 210 mm.
KDP Readiness Score Blog10 min read
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