Creating Design Elements for Template: How big?

ron

Morning everyone!

I am having our Design team create a company-branded template for my group. This way, everything that is produced by my group has the same look and feel. They asked what the dimensions were for various elements that they would create. Does the Lectora canvas have a certain size that should be used? For example, if they wanted to create a box that was to be situated at the top of the page and go from the left to the right (all the way across the page), what dimensions would they use to create that? (Same as if they wanted to go from top to bottom)?

Thanks!

Ron