![]() We've used the 2.8-inch-wide measure as the maximum width for phones to be eligible for this roundup, but it’s getting harder and harder to find phones that meet this requirement. So, that 2.8-inch phone width from LG is just a hair wider than the full reach of the average male thumb. A 2012 New York Magazine story cites a US Army study (Opens in a new window) that claims the average thumb length is 2.74 inches for men and 2.49 inches for women. The Center for Construction Research and Training estimates are a bit lower (Opens in a new window): 2.91 inches for women and 3.3 inches for men. According to an old NASA study (Opens in a new window) cited by HealthLine (Opens in a new window), the average handbreadth is 3.1 inches for women and 3.5 inches for men. Palm breadth tells you how wide a phone can be before it falls out of your hand thumb length tells you how wide a screen can be and still be usable in one hand.
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