PM box size on your forum

What is your standard members inbox size on your forum and why is it this number?

On our teen forum the max is 50 fo standard members and 1000 for Super Members. We have a lowish amount to help entice members to earn a Super Membership

 

I beleive it is 100 for members on my site... 2000 for staff. Could be 75 for members, not too sure. I will go check D:

 

Unlimited (sort of, it's a high number) for myself although I'll have to check back for normal members.

 

500 for regular members, 2000 for Premium Members, 9999 for Staff members.

I'm generally very lenient, and if somebody asked for an increase (including regular users), I would gladly do so.