Brahim's not 5'7. I'd say he's more like 5'5, which is Maradona's height. He is still smaller than most. Definitely, but he IS strong. He's growing too. I'd say he'd grow another inch, and he's getting that proper barrel chest thing that Maradona had too.
Take this photo I took during the u18s game v Liverpool. Fernandes is proper slight, the guy on the right for City, and Brahim, the one in the middle is the same height but you can see he's already much stockier. He's grown since i first saw him in July for the u18s too. Visibly... The really tall lad in front of him is probs 6'2 is, and i recall one thing where he shrugged off that guy as he burst forward. He's really, really strong. Defo small, but it already doesn't feel a problem. He's only just turned sixteen too so he'll probs get a tad taller and a LOT stronger.
Though I am old enough to be his dad depressingly.