Coloring Book Trim Sizes
Trim size is the physical width and height of your book. Choose it first — every page and the cover are designed to it, so changing it later means redoing everything.
The popular sizes
8.5×11" is the most common coloring book size — large pages give kids and adults room to color. 8×10" is a slightly smaller alternative, and 6×9" suits compact or travel coloring books. Square trims (8.5×8.5") are popular for younger kids and gift books.
How to choose
Bigger trims (8.5×11") fit detailed adult designs and big bold kids art; smaller trims cost less to print and feel more like a gift. Match the trim to your niche and check the sizes your top competitors use.
Design to it from the start
Set your page and cover dimensions to the chosen trim plus KDP's bleed and margin allowances before generating art. The cover width also depends on trim and page count, so lock the trim early.
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What is the best trim size for a coloring book?
8.5×11" is the most popular because it gives plenty of room to color; smaller trims like 8×10" or 6×9" cost less and suit travel or gift books.