What is the standard magazine cover size?

i have search but I didn't get the perfect result, I found many different size. some say 8.5 inches by 11.5 inches and some say 8.5x11, others say 8 3⁄8” x 10 7⁄8”. and some say 8.75x11.25. know im confused for real, can anyone help me please
Asked Dec 16, 2015

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