I use tubs only for my BP's, for the Juveniles I use Sterilite #1986 and for the adults I use Sterilite 1960. For the Rubber Maid version for the 1986 is the 31qt, measurments are 6.5 x 26.1 x 15.6 is what is written on the label. I don't know what the 1960 Rubber Maid equivelent is. Tubs are much easier to maintain and control by far and very cost effective. I have used Viv's in the past and now will stay with tubs.