A great of example of how gigantic they are is the difference between the male and female Empyrean Cartographer gauntlets. When I first saw the armor set, I thought it look really fantastic, but after seeing the male titan set (bungie has previously shown the female set), I immediately was disappointed and thought that they looked worse for it. This problem of shoulder pads being huge is on many titan sets, and there is very few smaller shoulder pad gauntlets for (male) titans.
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Bungie update: Titan shoulder charge damage now tied to the size of shoulder pads.