Double-Tuf  1 ½  quart waterer is like DT9872, but smaller. It is   7.25” w x 7.25” h without legs and 8.75” h with legs.  Use without legs for starting chicks.  As they grow, add legs to keep feed & debris out of the water. 
DT9872: 3 Quart poultry waterer with detachable legs.