What the rules say about MMA cage size
In the United States, state athletic commissions regulate the size of an MMA enclosure. Oregon (OAR 230-070-0025) and Michigan (R. 339.205a) require a fighting surface between 18 and 32 feet wide. Ontario applies the same range to its amateur MMA events. Ohio (rule 3773-7-11) raises the minimum to 20 feet and keeps the 32-foot maximum. The amateur rule set of the International Mixed Martial Arts Federation (IMMAF) also calls for an area between 20 x 20 and 32 x 32 feet.
These rules set the other key measurements as well. The platform can sit no more than 4 feet above the building floor in Oregon, Michigan and Ohio, and under the IMMAF rules. Metal posts extend 5 to 7 feet above the cage floor in Michigan, in Ohio and in the IMMAF rule set. The floor sits on at least 1 inch of closed-cell foam under a tightly stretched canvas.
A gym that plans to host sanctioned bouts should therefore budget for a fighting area at least 18 or 20 feet wide, depending on the jurisdiction, with a compliant padded floor.
The UFC Octagon: 30 feet, and 25 feet for some Fight Nights
The UFC uses a 30-foot-wide Octagon for its major events, according to MMASucka and dimensions.com. It uses a 25-foot version at the UFC Apex in Las Vegas and on some Fight Night cards, according to Wikipedia and BJPenn.com.
Dimensions.com lists the full-size Octagon with a fence between 5 feet 9 inches and 6 feet tall, a platform of roughly 3.3 to 4 feet, and sides of about 12.4 feet. The MMA Official catalog includes a Pro 30-foot Octagon built to standard UFC dimensions, with a raised platform and a walkway around the fence.
Training cage sizes offered by manufacturers
Cages built for gyms are smaller than event enclosures. European retailer Budoland sells a floorless cage in roughly 13 x 13, 16 x 16 and 20 x 20 foot footprints (4, 5 and 6.1 meters). Australian retailer Harvey Norman offers cages in 16, 20 and 24 feet. The Sourcify China buying guide puts training cages between 15 x 15 and 20 x 20 feet, and competition octagons between 20 x 20 and 30 x 30 feet.
On the MMA Official catalog, cages around 13 to 16 feet serve group classes and sparring, sizes around 20 to 26 feet suit gyms that prepare fighters for competition, and 30 feet and up matches the format of professional promotions.
A 13- or 16-foot cage falls below the 18-foot minimum in the rules cited above. It works for group classes and cage wrestling drills, and it cannot host a commission-sanctioned bout.
Height, platform and walkway: the real footprint in your gym
A cage takes more floor space than its fighting area. In the MMA Official catalog, competition cages add a walkway of about 2 feet on the Sparring platform model, about 3.3 feet on tournament cages and about 4 feet on the Pro 30-foot Octagon. The platform raises the fighting area by roughly 1 to 4 feet depending on the model.
To check your ceiling height, add the platform height to the fence height. For the full-size UFC Octagon, a 4-foot platform and a 6-foot fence put the top of the cage about 10 feet above the gym floor, based on the dimensions.com figures. A floor-level cage removes the platform from that equation, and the catalog recommends it for low-ceiling gyms and daily training.
Which cage size fits your gym
| Use | Fighting area size | Sources |
|---|---|---|
| Group classes and sparring | About 13 to 16 ft | MMA Official catalog, Budoland |
| Fighter preparation | About 20 to 26 ft | MMA Official catalog, Harvey Norman (20 and 24 ft) |
| Sanctioned competition | 18 to 32 ft, 20 ft minimum in Ohio and under IMMAF rules | Oregon, Michigan, Ohio and IMMAF rules |
| UFC Apex and some Fight Nights | 25 ft | Wikipedia, BJPenn.com |
| Major UFC events | 30 ft | MMASucka, dimensions.com |
Not every seller measures the same way. US state rules state a width (“wide”, “across”), while the MMA Official catalog reads cage size across the diagonal of the fighting area. Check the measuring method with the seller before comparing two quotes.
On the MMA cages and rings page, you pick the model, the size and the options (door, platform, camera stands) and receive a detailed PDF estimate.
Frequently asked questions
What is the minimum MMA cage size for competition?
Oregon, Michigan and Ontario set an 18-foot minimum width. Ohio and the IMMAF amateur rule set place the minimum at 20 feet. All of these rules cap the size at 32 feet.
How big is the UFC Octagon?
The full-size UFC Octagon is 30 feet wide. The UFC uses a 25-foot version at the UFC Apex in Las Vegas and on some Fight Night cards.
What cage size should a new gym buy?
Cages around 13 to 16 feet cover classes and sparring. Sizes around 20 to 26 feet suit gyms that prepare fighters. Add the walkway and the platform when you measure floor space and ceiling height.
