"Gigantic" isn't even in the same league as this guy!. Measuring a whopping 39; long x 18; wide x 15; tall with no less than eleven assorted - size exterior pouches, lots of webbing to attach even more pouches, double-zip access to the cavernous main compartment, double compression straps on each end, metal "D" ring attachment points abound, top clear ID window, wrap-around carry handle, adjustable, removable shoulder strap with movable pad and when the load gets too heavy, we've provided a padded, adjustable shoulder strap harness concealed in the bottom of the bag when not needed. Measures 39;L x 18;W x 15;H