How do I find how much disk space a program is occupying? How do I find out how much disk space a program such as Skype occupies?

My SSD is getting full, and I want to see what can be deleted.
Daisy Disk

It's a killer app for analyzing disk use on a Mac. It'll scan all your drives and shows you disk use broken down by customizable buckets: file types, programs, tags, etc. It can show you all the disk space used by a program like Skype if you like and more.



Edit: it's also on sale right now for $10.