Appropriate size for enclosure ?

[Minion3511]

Just came across these enclosures and Id like to get some opinions about the largest one which I'm considering getting.

http://www.bigappleherp.com/Big-Apple-Stackable-Reptile-Cages

 

[CooperDragon]

I think the large one may be OK for a very young dragon but it wouldn't be large enough for an adult. You'll want to look for something that is at least 48'' long by 24'' deep by 24'' tall or so.