40-inch Automatic Open Umbrella 2-folding Blue 40-inch diameter when open, and is large enough to shelter both you and your belonging from the driving rain. Strong center pole and durable fiberglass ribs. Measures 18.5-inch when it's closed, nice and compact when folded. Automatically opens by pressing the button. Waterproof and Polyester Umbrella cloth keeps you dry no matter where you are.