This Classic Dressage Arena, offers a simple, classic design that is safe, lightweight and easy to install. For permanent or temporary installations, the Classic Arena is available with the post anchor system. The posts are 5" x 5" x 16" and the rails measure 1 1/2" x 5 1/2" and are set at a height of 14". The Classic Arena includes two decorative round ball caps for the gate area.