carlson,
Here are some enclosures I use. This will give you an idea of the sizes you'll need as your T grows.
First up slings.
You'll want to keep your slings in something kinda small. Easier to keep humidity up, you can find them faster and they can find food faster.
You can use vials, coin holders etc.
Found this at Hobby Lobby in the paint dept.
(blue cap is a cap for a 1 gallon milk jug)
I also love these boxes. Found at Hobby Lobby an Office Depot. I use these for Ts, roaches and even have some Carpets in the bigger ones. Very sturdy, locking handles and stackable.
They are called Really Useful Boxes
Inside
As they get bigger I just move up a size.
Inside the larger one.
I'll add a bottle cap for a water bowl. When they are smaller I'll add rocks they don't drown and the food can climb out.
These round ones interlock.
OBTs
For a T that doesn't make a web to hide in, I'll place bark in the enclosure and start a hide for them. They will dig around and fix it they way they like it.