There are two sizes of Northwood Thin Rib vases. Standard size and midsize (there are no funeral sizes). The standard size has nine ribs. There were at least four different molds used for the standard size and base diameters range from 3 3/8 inches to 3 3/4 inches. Heights range from 6 1/2 to 11 inches. The Jester's Cap, with one point pulled up, is scarce; there is also a version with all of the points rolled down. The midsize Thin Rib has eight ribs and a base diameter of 4 3/4 inches. Most are 12 to 15 inches in height. The jardiniere, shown on the right with a midsize in aqua opal, is rare.