Without the plastic cap (which covers the hole when table not attached - and quite frankly I've never used it - looks better without) its 9 mm thick at its thickest point. In this pic, this is the circular area just inside the screw holes. Outside of that its a couple of mm thinner.
It's designed to sit on the surface, so yes it would be proud by that amount.
https://goo.gl/images/OAWVR4 The circular base is 180mm in diameter, so a bit larger than the recessed type, in order to spread the surface mounted load.
Even the recessed type still sits proud of the floor maybe 4 or 5 mm, so not much difference really.
They also do a version of it with the base in polished stainless steel. That's what I've got - looks really nice.