dragon cage

Question
Hi. Just a quick question. I have a male and female Bearded Dragon in separate cages. This is a little annoying so i want to get one single cage. I know the male will harass her non stop so i want to set a divider in the center of the tank. How big does the take need to be for a divider?

Answer
 I have divided cages.  All I did was take tanks that were 6ft long by 2ft deep by 18" high.  Then I purchased a piece of 23.5" by 17.75" sheet of 1/4 inch thick opaque plexiglas and used a hot glue gun to attach it in the middle.  I've also done the same to regular tanks while raising hatchlings, and when empty, the glue can be pulled off easily for use by a single dragon again.