The "Dannebrog" or Danish Cloth. The Guinness book of world records recognizes Denmark as having the longest-running national flag in the world.
The current version was adopted in 1748. However, various versions have been in use since at least 1400.
According to legend, the flag fell out of the sky at the Battle of Lyndanisse in 1219. The flag supposedly turned the tide in a battle between Danes and Estonians.
The flag is 3'x5' and made from a premium 100 denier polyester. It has a white header with two grommets. There are four rows of stitches on the fly and two rows on the top, bottom, and header side. The image is screen printed and appears on both sides. Writing will be reversed on the back.
3'x5' flags are 3 feet x 5 feet, 36 inches by 60 inches, 91 cm by 152 cm, 1 yard by 1.7 yards. This is the most common size flag you see hanging on porches, small flag poles, hanging at festivals, and inside of bars and restaurants.