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Refers to the physical size of the watch.
Sorry, there was a problem. Please try again later.More specifically, it refers to the diameter of the FACE of the watch, as you look at it from the top. 51mm is the same face diameter for the largest Fenix 3, 5, 6 watches.
Sorry, there was a problem. Please try again later.This refers to the physical size of the watch. For more information contact us at [email protected] or visit our Support Center, https://support.garmin.com/en-US/ Thanks Jenny
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