I've had my blueys together in 4" x 2 1/2" x 2 1/2" enclosure but as summer has come on they have started to fight so will have to be seperated asap...
They were okay for about 6 months but i think they are getting to that age where they get a bit territorial..
ben
EDIT: just had a look and they are laying on each other under the heat lamp and look quite content, i'll still seperate them just to be safe. But in their outside enclosure they are fine together..Just inside is a drama