I wish the additional mat outside the circle was the requirement for all college mats! I get they may not be able to have the XL mats for large tournaments because of floor space, but it would be great if all schools had them for duals.The circle has to be between 32 and 42.
Iowa appears to have more strips around the perimeter, outside the circle. Makes the "action" area bigger; no stoppages for a foot/hand on the basketball floor that way.
I despise the octagon mats as there is very little room for wrestling on the edge.