Years of experience in the scrapbook and album business makes mcs-mbi a leader in style and quality. The 12 by 12 pages are acid free and distortion free. Each page protector with white paper insert holds 2 scrapbook sheets (front and back) for a total of 20 scrapbook pages. The page size is 12 inch by 12 inch and the overall dimension of the book is 12.625×13. 5 inch. Refill scrapbook pages come with extra posts for easy expansion (refill # 899676).