His listed height is 6'5" and weight about 210 lbs. But, I think he's closer to 6'4". Anyway, he reminds me a little of Maurice Ager.
BTW, Marcelus Kemp play for the University of Nevada. Nick Fazekas has been getting a lot of the credits for their winning record so far. But, Marcelus Kemp's contribution has been as important as Fazekas. He's been averaging 19 ppg 2.7 rpg 2.5 apg. His stat doesn't look very special. But he's an efficient shooter; .494 FGP, .722 FTP in 18 attempts (he's .855 last year with 100 attempts), .515 3PP with 33 attempts. Other good things about him is he has strong upper body and also above average athleticism.
His biggest weakness is his ball handling skill.
I think he's a good late 1st round to mid 2nd round prospect. Nevada hasn't played against any major program yet. But he's worth to keep an eye on.