Dear Ladies and Gents,
I can definitely hear a lot of you thinking to yourself "Well, how long is a piece of string?" and "Surely it's horses for courses...", but I reckon that this is one seriously underdone topic...
Going by the numerous little pencil lines that we drew at various heights on the wall above the Vanity Basin today, the essential problem with the positioning of Shaving Cabinets is that a bottom-edge height that places the mirrored doors down low enough to suit a shortish female who is trying to apply makeup (ie. eyes looking downwards slightly), might result in a top-edge height that does not suit a tallish male who is trying to comb his hair (ie. eyes looking upwards slightly...).
And the plethora of different cabinet-heights that are available adds to the dilemma somewhat, because a tall cabinet with mirrors that would be long enough to accommodate both of the above extremes, might end up with a top-edge height that precludes comfortable placement of things like Shaving-Cream cans on top! (I can just picture all the female forumites thinking "Ahh, Bliss! " at this point...)
So are there any general rules regarding these measurements? Maybe there's a magic height that they should all be "centred" on, vertically? Do the instructions that come with a "Rifco", or one of the "Award"-brand units that Bunnings sells, suggest any particular heights?
Failing this, I'd be interested in hearing what mounting-heights you've positioned your own units at out there, along with the carcass-height of the cabinet in question...