Solid Yellow 12 X 18 Replacement Safety Flag for ATV or Bicycle. This is for one Solid Yellow Replacement Flag. The Flag is 12 inches x 18 inches long. The flags are made out of a polyester blend material and are weatherproof for outdoor use. The sleeve of the flag will fit a 1/4" to 5/16th" pole. (Larger pole sizes available) Flag will adhere to pole with glue. ( glue not included) I have 50 flag styles to choose from. Please check out my Amazon store for other flag style options at http://www.amazon.com/shops/atvsafetyflagsandmounts