A cow stall for a side-by-side type milking parlor, i.e., of the type in which the cow is milked from behind her hind legs, has its side walls angled outward to be somewhat wedge shaped. In the milking parlor, the operator pit can be of arcuate shape, so that the operator can see all of the stalls from any vantage point in the pit. Because the stalls angle out, the stall width is at least about thirty-one inches at the front gate to accommodate the cow comfortably, and it is reduced to about twenty-two inches at the rear wall. i.e. at the operators pit. This reduces the distance from one operator position to the next without impairing the exit of the cow through the front gate following milking.