mr.who says on 15/Jan/12
I think he may be a little bit shorter.
Damon next to Aaliyah (165cm):
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... and next to his wife - Rachel Roy (uknown height, but she must be very tall if Damon is 178cm):
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He may be like 174cm (still almost 10cm taller than Aliyah).

SAK says on 19/Nov/10
He is 5ft10 but looks taller.

jack says on 19/Nov/10
saw him in person and he appears to be a tad over 6 feet...almost 6'1