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I don't have a SKX173, but I do own a SKX175 (case should be the same) thats somewhere
over 11 years old and has been a great watch.
the size is about 41-42mm case size and stands about 14mm high on the wrist and is still comfortable to wear. it's just a bit larger than the Rolex Submariner, and about the same as the Omega Seamaster 2254.50.
I think I have a picture of the 175 but it looks average size on my wrist since my wrist measures about 8 3/8"..
I own 3 of these type divers and all seem like fine watches..
hope this helps,