What size tub to get?

[Ditto]

Hi! So I'm planning on upgrading my new guy to a tub in the near-ish future and I'm not sure what size to get? I don't have his weight (I'm getting a scale really soon, don't worry) but he's about 15 inches long and he was hatched in july so he's pretty young, so based on that what size tub do you think I should get? Thanks!

[Stewart_Reptiles]

On average I do

6 quarts up to 150 grams
V18 up to 600 grams
32 Quarts or V70 after that