Our mapcase has already proved to be first choice when used on our tank bags. The map pocket measures 10" X 11.5" (=26x29cm), enough room to hold maps of nearly any size! The front opening is convenient too: The map can be put in easily. No need to fold the map several times. Fold it once and it will fit. Your maps will also remain intact much longer.Due to its convenient size, this map holder makes map reading easy. Has a Velcro strip (hook) at one end. There is also a full length Velcro closure for the map pocket. The rear strap fixes the map case to our tank bags.