USA boat flags are available from 12"x18" through 48"x72" with embroidered or sewn stars and sewn stripes. Printed versions are available from 12"x18" through 24"x36". All are USA made. Flag size on boats is determined by the overall vessel length; or height above the waterline of the tallest mast. The national ensign should be one inch on the fly for each foot of overall length of the vessel, or mast height above the water line for sailboats. A 30 foot long power vessel should fly a national ensign that has a 30 inch fly. All other flags, ensigns or burgees on power boats should be 5/8 inch on the fly for each foot of overall length, or 1/2 inch on the fly for each foot above the waterline of the tallest mast on sailboats. (ref. U.S. Power Squadrons)