The seadragon, known as a Wyvern, was the symbol of the Saxons in England. A gold dragon on a red background, used by the West Saxons, most likely was inspired by Roman military standards.
The flag of the Kingdom of West Saxon. West Saxon, or Wessex, was a kingdom from 519 AD - 927 AD. It is uncertain when the flag was first used. Two different written accounts from the Battle of Burford in 752 AD mention the flag.
In 927 AD England was united. However, the flag was still in use. It is depicted in the Bayeux Tapestry as being flown by King Harold II, former Earl of Wessex, at the Battle of Hastings in 1066.
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.