Model number S-818SW Scoop Seat Stool. This stool is substantial and will hold you in comfort. The large diameter seat is very comfortable with the scoop profile. The stool has a very sturdy ball bearing swivel that will hold up very well over time. It also has a cigar shape profile to the rungs adding a bit of heft the the base profile. The top measures 1-1/4 inch thick and 14 inches in diameter. The stool stands 18 inches high making it perfect for your 30 inch tall table. Sold and shipped built only. Assembled dimensions are 16 x 16 x 18 inches high.