Printing Sizes of models

Hi, I am designing some miniature models for a game, I designed them to be around the 32mm mark but some of them are on vehicles, others have weapons which raise their height - is there a way that I can compare their sizes side by side in some program along side a real world ruler before I send them off to be printed?

Thanks.

Download Netfabb Studio Basic from www.netfabb.com
You can use it to measure things easily.