AMPERSAND SHOPS 8-Ft. / 9-Ft. 6-Rib Patio Umbrella Solar String Lights (Cool White) Dimension of each rib: 1/2" W x 7/10" H (12mm x18mm) Shape of umbrella ribs: Elliptical Solar-powered; no electricity required; LED light quantity: 30 Comes with an "on/off" switch Includes 32 all-weather plastic clips to hold solar string lights onto umbrellas fabric cover