How long do you "wait" after someone has your number?

The next monday. but maybe she's nervous to call you or whatever. if you don't think thats the case then maybe she's not interested. but when she texts/call you. if she does.. anytime soon. give it a day til you reply. trust me. cause then she'll be wondering why you didn't respond? or what your doing? or if you like her? or if your even interested.... it always works that way. girls worry a shitload my friend. but ofcourse there's always the case that she possibly isn't interested or something happened.

I am not sure how long you should wait. It depends on individual people, but I would think if somebody is really interested, it wouldn't take too long.

Usually, when I give my number, it is within a day that I get a call. I don't even take someone's number, unless I plan on calling. For me, I would be nervous, but still call that day or the next day for sure.

If someone just gives me their number and doesn't even know I want it, I most likely won't call.

Depends how you gave the number.. Like if you answer my personal ad.. thank you but it doesnt mean youre my match so I may not necessarily CALL YOU.. but if we meet and mutually exchange info , I should call you pretty much right away..

Should we assume that's what happened here? :)

Everyone else gave really good answers already.

Just give her some time. I wouldn't use the words "give up," so if she doesn't call you soon, don't give up on her or on yourself. :) Be patient.

24 hours. if it goes over that; they're probably not interested or are unsure of how the 'waiting' game goes themselves & don't want to appear 'desperate' as would you, if you were in their position. ;]