In the run up to Mayweather vs McGregor, are going to try to demystify some of the talk going around surrounding what should be the biggest combat sports event of all time on August 26.

Today, we’re going to start off by looking at the claim that ‘McGregor is a lot bigger than Mayweather.’ This is a line being peddled by plenty of fans and media heading into the bout and it’s even being used by some as a reason as to why the playing field is more even than most originally thought.


McGregor only this past week drew attention to the fact that come fight night he will have a big size advantage over the 49-0 undefeated world boxing champion.

“My weight is at a good place and I’m going to be a much bigger man than Floyd when we step in the ring for the fight,” McGregor said at the media day in Las Vegas this past weekend. I think that makes a difference.”

He later commented more on Mayweather’s size and stated that if the American comes in over 150-pounds for the fight, he will be “out of shape.”

The Irishman says he expects to walk into the ring 170-pounds on fight night, thus implying he will not change up his usual weight cutting techniques that he uses for his MMA fights.

With weight cutting less prolific than it is in boxing, it’s not unreasonable assumption to think that come fight night we will be witnessing a 154-pounds Mayweather facing a 165 to 170-pounds McGregor.

Height And Reach

McGregor’s likely going to be the heavier man, but what about the height and reach?

Well despite Mayweather’s best efforts to deceive the eyes on the recent world tour, the Irishman will have a slight height advantage as well.

McGregor stands at 5’9” (1.75m) while Mayweather stands just one inch shorter at 5’8” (1.73m).

Add in the UFC lightweight champion’s reach advantage, McGregor 74” vs. Mayweather 72”, and on paper at least there are some advantages for the Irishman to take into the fight.

Not that any of this will worry Mayweather.

“Weight don’t win fights, skills wins fights,” has been a line repeated by the undefeated champion for years and many fighters such as Canelo Alvarez have learned that’s it’s no lie.

So there are the facts. McGregor will be bigger on fight night, but it’s not anything Mayweather hasn’t dealt with before.