i'm 5'5 but i can match with tall guys on average i play against people 6' and above. once i rejected a guy who was ova 6'6 .

but you hav to work on speed more acceleration though and when getting to the basket work on being able to move in the air twist turn all of that because that makes you unpredictable even once your in the air. by being able to move in the air you become more unpredictable and harder to guard. also work on your jump i can hang of the rim and i can tell you being able to out jump someone taller than you puts you closer to even terms.

also base strength is very important this way you can be better in defense against bigger players. also when driving don't try and knock through people but act more skilled and finesse and weave your way through the d.