Brandon Marshall is just 16 years old but already stands at seven feet and four inches and he is being considered as the tallest teenager in the world.

The giant boy became the tallest teen in the world after former record holder Broc Brown, who is 7ft 8ins, turned 20. Brandon has grown an extra five inches in the last year and doctors say he has not reached his final height.

The tall teenager is known as “Tiny” by his friends. Thanks to his height, he has just fulfilled his sporting dream by being picked for the Welsh national basketball team.

His mum Lynne Quelch, 49, said:

“I can’t believe he’s still growing. To be honest I don’t know what height he is going to reach. He does tend to struggle with roofs, ceilings, doorways – just everything normal size people take for granted. He has got a super king bed at the moment but we are having an eight foot bed custom built for him.

“It is crazy, walking down the road with Brandon. People stop him, asking for photos with him. He is so shy as well, bless him. When people notice his height, he says ‘oh here we go again, yes I am tall, yes I am Britain’s tallest teenager’.”

Brandon, of Bury St Edmunds, Suffolk, first hit the headlines last year when he measured 6ft 11inches. But since then he has carried on growing and is showing no signs of stopping. Medics have carried out a raft of tests on the teenager, but still don’t know why he is growing so tall. Previous scans showed he is missing chromosome 12, known as the height cropper chromosome.