Right mr Knight, a foot or so. 'Boos grow well, if you feed them right.
Moving sharks is tricky (trust me, iv assisted moving some of them at seaworld here in orlando). But as long as your patient (and careful, and wear a cup!) its fine.
The reason mine is in a 10g right now is simply because I am moving home in the next month (or maybe 6 weeks).
The reef tank is no problem to move. Iv moved that thing 4 times now. No loss so far.
The baby shark, I know I have to be more careful with. So, the ten is where its staying and getting daily water exchanges. When we move it will not have to be removed from the tank, nor will it be without filter for more than 20 minutes... Maybe even less if I move it in my car.
Once in the new home it gets the 60 gallon for about 2 or 3 months before (fingers crossed) the shark lagoon / tank is ready.
Plans so far put it at 11' x 15' x 4' deep.. (will be like the Koy pond I build in the UK 15'x12'x8' deep)
Try not to listen to the panic mongers. As long as your filter can handle it, theres enough room that the animal wont stress and you have a solid upgrade avalible. Your fine. Keep the word temporary in mind. Keep a close eye on things. Watch for stress. Your good.