What size sump should I use?

[newguyintown81]

I'm starting a new build this weekend with a 60 gallon cube and I'm looking for how big of a sump I should use? The tank has a corner overflow in it.

 

[lpsouth1978]

I always recommend the biggest sump you have room for. You can't go too big for a sump, but too small is an issue!