What are the trim sizes and dimensions for Bleed pages?

If your book has bleed, add 0.125" (3 mm) to the page width and 0.25" (6 mm) to the page height. For example, if your trim size is 6" x 9" (15.24 x 22.86 cm), set the page size to 6.125" x 9.25" (15.54 x 23.46 cm).

An 8x10 inch book with bleed would need to be 8.125" x 10.25"