Lighthouse OPTIMA 3S Stamp Stock Pages-10 Pages OPTIMA 3S double-sided, black background pages are designed to hold American and Canadian plate blocks. Each of the 3 pockets on both sides of the page (6 total) measures 7-1/10" x 3" (180 x 77mm). The entire page measures 8-1/4" x 10" (202 x 252mm). Each order is for a pack of 10 pages. Made in Germany.