Hey Bax,
I keep on forgetting to measure.
What dimensions did you give em?
BTW how much did it run you?

Mine is 5 x 10". I don't recall the price & can't find the receipt. Check at husco.com

how do you have that mounted? is it very sturdy?

It is very sturdy. I had to disassemble the OEM armrest to bolt, not screw the Husco to the wooden frame of the OEM armrest. I reinforced the hinge screws, too. I don't remember the details - I installed it over 3 years ago.