I had planned on ordering the small Vision tub for a baby tortoise. Then after talking with the guy at Vision, I decided to save $41.00 and purchase the Boa tub. The Boa tub is 30" x 40" x 9.5" and cost $69.00. The small Vision tub is 26" x 40" x 11" and cost $110.00. I know I am being lazy for not building an enclosure, but laziness aside, who would want the small tub given these differences? The guy did say that the plastic is slightly different, but that the difference would be inconsequential for housing a tortoise.