Introduction to 20-Meter Circles Tim Christensen explains how a 20 meter circle is used in Western dressage and shows where in the arena you will use it. By Jillian Sinclair | May 18, 2022 | 1 minute read Tim Christensen explains where in a dressage arena you will use a 20-meter circle. He shows which letters you will use to measure your circle and explains some common mistakes made with a 20-meter circle. Click here to watch now! What did you think of this article? Submit Rating Thank you for your feedback!