As of 2012, the standard WWE ring is one of the largest, dimensions-wise.
"Ring Size": 20 x 20 feet mat area (measured between the turnbuckles)
Ring Apron: 1 foot beyond ropes
Turnbuckle to Post: 12-18 inches from ropes
Turnbuckle Pad: padded coverings bound over steel rope-anchoring turnbuckles
Total Ring Floor Area: 20' x 20' + 1' x 1' = 21 x 21 feet
Mat Height: 4-6 feet from floor, 4.5' average
Rope Heights: average 1, 3 and 5 feet from mat (1.5 to 2 feet between ropes)
Rope Dimensions: at least 1 inch diameter, 60-80 feet per rope (15-20' per side)
Number of Ropes: 3 top to bottom, 3 per side, usually 12 tightened segments
Rope Material: rope (as opposed to cables used by some companies)
Mat Material: padding, heavy Canvas, plywood, steel Crossbeams and wires
Ring Posts: heavy-duty material, usually metal, 9-10 feet tall, 3+ inches diameter
Total Ring Height: 10 feet from floor to top of post, 9.5 feet from floor to top t.b.
