For an adult female general floor space is usually

34" 17.5" x 5.3 for Vision tubs and similar sizes for other manufacturers.

For adult males they can be kept in something smaller around 23 5/8" L x 16 3/8" W x 6 1/2"

Those shown would be great for arboreal animals I could see crested geckos in those.

With BP the floor space is more important then the height (they are ground dwellers) and as far as display you will be very disappointed, BP are the worse display animal you can own as they spend 80% of their time hiding. Best way to see a BP is to hold it

If you want to go the rack way I would suggest getting something that is widely available, and for which you will not have problem finding tubs, in other words keep it simple.