Tub Size to small?

Will a tub measuring 28 1/2 x 18 x 6 be big enough to house adult ball pythons? THe tubs are gong into a rack. These are the only size Iris tubs that I can actually get locally in my town. I can not afford to pay $20.00 shipping on top of the price of tubs for the CB70 or should I go with the Sterilite 1860 which measures 34 3/4 x 16 1/2 x 6 ? I do like the iris better if it would be big enough.

Id use the 34 inch one it is bigger

Tons of British royal python owners house their adult bps in 50L Really Useful Boxes that has a floor dimension of 28x18. Seems like the "normal" enclosure over there.

I would go with the larger one for adult females but the smaller one is okay for males!

thats fine for all but the largest females. 4000 grams plus but for the average BP its fine.