Correct Screen Size

[Tom Cole]

I am converting a HyperCard stack to rev and I wanted to go beyond the 
old classic Mac 9-inch screen size. I put a centerme command in the 
openstack script, but I would also like to size the screen 
automatically to a size that is standard these days. I don't know how 
to do that. Is there a good, all-round screen size, and how do I set 
that as a default for my stack?
Thanks,
Tom in Arizona