NEOPlex 3' x 5' Ireland County Flag - County Mayo by NEOPlex. $15.95. This big 3 x 5 foot NEOPlex Countries of the World Flag is made from super polyester that is durable, yet lightweight enough to fly in even the lightest breeze. It has 2 brass grommets firmly attached to heavy canvas on the inner fly side. Bright, vivid colors and colorfast to reduce fading. Many titles to choose from.. Save 47%!