How big is the standard Flat Top? Follow The Flat Top measures 27" x 20" and weighs 30 pounds. The drip tray measures 3.5" x 7" x .5" tall. Related articles Does grease ever run off the front of the Flat Top? How is the Flat Top made? Where can I view the Flat Top instructions? Can the Flat Top Slim or Jr. sizes be used on glass ceramic cooktops? What is the difference between a Range and a Cooktop? Comments 0 comments Please sign in to leave a comment.