The height of the slide switch base is 3.4mm
The height of the slide switch sticking up from the base is also 3.4mm
This makes switch's total height 6.8mm  

Rating
25 volt .5 amp rated, this slide switch can control up to 25 LEDs max.

We have prewired the switch with 8" red kynar wires. If you have not added a switch to a project before, you add in the switch by connecting 1 of the red wires to the positive wire coming from your power source, the other red wire on the switch goes to the red of the LEDs you plan to control. Both red wires go to a red wire.