Eero Saarinen Knoll Tulip Stool Limited Edition 50 Year Anniversary Red Leather Stool Saarinen Pedestal Series Dimensions Height: 17.5 in (44.45 cm) Diameter: 15 in (38.1 cm) Seat Height: 17.5 in (44.45 cm) Date of Manufacture 2007 The Saarinen tulip stools are cast aluminum with a swivel base. There is a Rilsan coated finish for the black and white stools. The signature of Eero Saarinen is located on the underside of the base.