RPM

Does Debian have RPM utility? Where can I get it? I have already have useful packages in RPM. It would a shame if I can't use it and have to download tgz version all over. Thank you very much!

package

How do I know the size of each packages which I want to install? If I use SuSE or RH, you can query it. If I use Debian, by what way I can do the query of the .deb packages?