How do I ask a guy how tall he is respectfully?

Exchanged numbers with my Uber driver he’s cute and whatever but I didn’t know how to ask him how tall he is. Height does matter to me because I am 5’9” but don’t want to be disrespectful to him by just asking

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29 d
Holy shit this blew up. Thanks everybody, even the short guys. Luckily he was over 6 foot.
How do I ask a guy how tall he is respectfully?
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