I was watching a show last night where scientist measured a punch by a professional heavy weight boxer using 12oz gloves. He measured 1300 lbs of force. They also measured Rampage Jackson's punch using 5oz MMA gloves and he measured 1900 lbs of force. But here's the part that i thought was amazing...the size of the gloves didn't matter at all. They found out that 12oz or 5oz both decreased the force by 20%. The size didn't matter at all. Rampage Jackson went on to say that "MMA is the safest full contact sport, because he's only taken 100 of those kinds of shots to the head in his whole MMA career. But boxers have to take 100 shots in one round."