How long should I wait for him to message me first after matching on OLD?

I am in my 30s and matched with an age-appropriate man on OLD yesterday. How long should I wait for him to message me for the first time?

If he hasn’t messaged me within three days, should I unmatch?

Sorry if people have posted different versions of this question on this forum.

Thanks in advance.

EDIT:

Thank you for your amazingly prompt responses. It’s been three days, and I unmatched.