Shop for Maryland Flags at My Flag Store. Made with high quality materials, your flag can be used indoor and outdoor while keeping its colors vibrant. Specifications: Material: Polyester Size: 90 X 150cm Weight: 80g / pcs Interesting Fact: Maryland is a Mid-Atlantic state that's defined by its abundant waterways and coastlines on the Chesapeake Bay and Atlantic Ocean. Its largest city, Baltimore, has a long history as a major seaport.