The straight version is a flag that mounts on a vertical pole.  Some 31’ Commanders utilize adjustable rail mount pole holders so you could use either. Size 12 X 18. Grommet to Grommet measure 11 inches.
 
Note to International Members: Due to postage increases we had to add a $10.00 surcharge, resulting in the price being $50. Also, it is possible that additional taxes could be due upon delivery.