At a whopping 2.13m Dean Williams may just be the world's tallest rugby player.

At an impressive 2.13 metres (7 foot in the old money), Dean Williams could be the largest man in rugby – anywhere.

And the ex-pat Brit is putting his considerable size to good use as a premiere-grade lock with the west Auckland-based Suburbs RFC.

Coach Charlie McAlister reckons the 27-year-old construction manager who arrived Down Under only last year is showing a lot of promise.

Jason Dorday Dean Williams is used to having to duck through doorways.

"He's a superb young man, I'm hoping that Auckland will pick him up for the ITM Cup."

And how could they not, the size 15-shoed second rower skittles those unlucky or courageous enough to try and tackle him.

His advice to lilliputian centres and first-fives attempting to tackle him: "don't".

DAVID JOSEPH / PHOTOTEK.NZ Dean Williams' advice to would be tacklers? "Don't".

Williams – who had semi-pro English sides "sniffing around" back home – reckons his rugby career could take off right here in New Zealand and he intends to push as much as he can.

He is pretty impressed to find out he's probably the world's tallest rugby player. All Blacks tall timber Brodie Retallick measures 2.04m and Sam Whitelock is 2.03m.

For the Springboks Eben Etzebeth is the tallest lock at 2.06m and for France their biggest, Yoann Maestri, measures 2.02m. At the 2015 Rugby World Cup the title for tallest went to Ireland lock Devin Toner who measured in at a whopping 2.1m.

JASON DORDAY/FAIRFAX NZ Dean Williams wants to go as far as he can with rugby in New Zealand.

Growing up in football-mad Manchester, Williams attended a high school known for rugby.

The Mancunian, who has always been tall, is well used to being called "BFG (Big F...... Guy), Lurch and all the other tall person stuff and just tries simply to "get on with it".

He used to get "unwanted attention", some people tried to "push him around". But aside from occasional hassles like aircraft seating and finding clothes that fit, Williams has embraced his tallness.

And he has embraced the dietary requirements that go with it.

Not a fussy eater, Williams daily puts away "five or six" full-size meals.

"There's a lot of calories that goes away in the day."

And like any young man away from home, he misses his mum's Sunday roast and steak and potatoes meals.

Williams doesn't know where his height comes from, but his mum is close to 1.83m (6 foot) in height. His father comes in a little lower at 1.78m (5 foot 10). He weighs 132kg.

* This article earlier compared Williams to All Black lock Dominic Bird. Details in this comparison were incorrect and have been removed.