Does being real tall affect urine volume? they say < 2l a day is normal but i put out atleast 3-5 in a day. is this because i'm 6'8" and just larger

Urine output varies: How much you eat and drink has more to do with your volume of urine than your size. It's true a big guy who is 6'8" will make more urine than a little old lady who is 5'5", but there is not a direct correlation to size. Stay well hydrated, drink at least 64 oz of water and non-sugary beverages a day and your kidneys will thank you!