Sylvia 2600 has 3 extensions. Shown with Sylvia 460 4-drawer unit, not included.Larger Machine Opening: 27 3 /8" x 14 13/16"Open Dimensions: 65"W x 40"D x 29 3/4"HClosed Dimensions: 65"W x 24 3/4"D x 29 3/4"H