A good umbrella prpvides good shelter, more features and better coverage for a reasonable price. Average umbrellas are 11 to 12 inches long when closed, and can weight ahywhere betwwen 9 ounces to 17 ounces. Small umbrellas open up to 26 inches and bigger ones can go upto 50 inches.
A good umbrella can withstand a stiff breeze, and iyt will flip inside out duging sudden gusts. That means that a good umbrella will bend but will not break. Moreover, a good umbrella will flip back to its proper form easily, everytime..
The best umbrella for normal use: Lewis N. Clark Umbrella (38 inches when fully opened, tough, lightweight, inexpensive, and right size when open or losed)
The second best umbrella: REI Travel Umbrella (superior quality, pricey)
The best umbrella upgrade: Davek Solo (life time guarantee)
The best light umbrella: EuroSchirm Light Trek (compact size)