The 31-year-old boxer – who is the nephew of boxing legend Chris Eubank – spent the last four years getting down to 140lbs but has now made the decision to step up to welterweight and the change in his physique “feels good”.
He told Boxing News magazine: “Welterweight has felt good. I feel like my body has grown anyway since being in the ring 12 months ago.
“My physique has changed, I’ve got stronger and I’ve filled out more.
“I’ve always been in the gym with heavier guys, so I think I’ll grow into the weight nicely.
“When you cut [weight] you find out more about yourself, but I feel like my body has grown into the new weight already and will now continue to grow.”
As well as Chris being a mentor in the ring, Harlem has also always looked up to his uncle for his sense of style.
He said: “I always saw what he was rocking and I liked that. You know, it was different.
“The shapes were kind of very boxy and then obviously the jodhpurs is something different. It’s a kind of statement every time he turns up somewhere.
“He’s communicating a message; a black man rocking the old English attire. It’s kind of a contradiction and I think he likes that message. But I’ll leave the monocles to him.
“I feel like the old-school fighters paid close attention to what they wore and they’d make a statement with what they’d turn up to the presser in. It’s another way to communicate who you are to the world and I think that boxers have always done that pretty well.”