The Oklahoma 3X5′ State Flag in several sizes and materials. From 3’X5′ up to 12’x18′. Flags are available in durable nylon and strong polyester material. We also offer complete indoor flag sets. November 16th, 1907 was the year when Oklahoma became the 46th state admitted to the Union. Oklahoma’s first flag was adopted in 1911, four years after it became a state. The most durable and longest lasting flag. Used for ceremonies, in parades, or indoors in auditoriums, in courtrooms, on stages, or on podiums.