What do I need to know . . . . Fav size: Fav Footing: Wall components: What i was thinking was 4x4 posts with gates between 60 ft diameter?????? This is to also be a perm part of the pasture. Hard to describe but my pasture is a triangle with the wide part closest to the barn (main gate). About 80 feet into the pasture I am putting up a fence to keep them in/out of said pasture or in/out of the dry lot type area. In the middle of that divider fence line i want to put the round pen (no divider) with a gate to either the dry lot or the pasture.