Originally Posted by NorCalTA
Never mind - the size is stated on the sellers ebay auction - Size: L89 x W59 x H35 mm or 3.5"L x 2.32"W x 1.37"H
I've ordered 3 of these dimmers, and before that I've asked the seller for a photo of the pcb inside, here it is:
Judging by that photo and the width of the casing (59mm), the board is around 50x50mm (maybe 45x45mm) and pretty slim. The nice thing is that the pot is separate from the pcb so it would be easier to waterproof the pcb and mount the pot in a nice place.