Short answer: Common U.S. trim sizes include 5.5 x 8.5" and 6 x 9" for books and 8.5 x 11" for magazines, catalogs, and workbooks; Printseoul's instant quote accepts custom sizes from 4 to 11.8 inches wide and 4 to 14.3 inches high (hardcover starts at 5.4 inches).
Trim size is the finished size of the book after the pages are cut, and it is the first number you choose. It affects paper use, page count, and price.
Common sizes
- 5 x 8", 5.25 x 8", and 5.5 x 8.5": common for trade paperbacks and fiction.
- 6 x 9": a widely used size for nonfiction, business books, and memoirs.
- 8.5 x 11": the standard for magazines, catalogs, workbooks, and reports.
- 8.375 x 10.875": a common magazine trim size.
- 7 x 10" and 8 x 10": popular for photo books, cookbooks, and instructional books.
- 8.5 x 8.5" and similar squares: common for children's books and photo books.
These are conventions, not rules. Your genre, your distributor, and the retailer you sell through may prefer a specific size, so check before you commit.
Printseoul size limits
The instant quote offers four presets (8.5 x 11", 8.375 x 10.875", 6 x 9", and 5.5 x 8.5") and a custom option. Custom sizes can be from 4 to 11.8 inches wide and 4 to 14.3 inches high; the quote tool flags a spec it cannot price. Sizes that fall between standard cut points can price differently from a nearby standard size, so check the quote for your exact dimensions.
How size affects cost
A larger trim uses more paper per page, and some sizes cut more efficiently from the sheets the press uses than others. Moving to a slightly smaller or standard size can reduce cost without changing how the book reads. Price two or three sizes in the instant quote to see.
File setup reminder
Whatever size you choose, build the file with a 0.125" bleed on every side and keep important content inside the safe area. See the bleed and trimming guide.
Frequently asked questions
What is the most common book size?
5.5 x 8.5" and 6 x 9" are widely used for books, and 8.5 x 11" is the standard for magazines, catalogs, and workbooks.
Can I print a custom trim size?
Yes. The Printseoul instant quote accepts custom sizes from 4 to 11.8 inches wide and 4 to 14.3 inches high.
Related reading
- Five Print File Specifications You Must Check Before Ordering
- How to Calculate Book Spine Width for a Perfect-Bound Cover
- Saddle Stitch vs. Perfect Binding: How to Choose