It's a 2" plus gauge with maybe 3/4" numbers. The numbers are well illuminated in the middle however the outside edges have color fade. The gauge works however it isn't the quality I would have liked. The gauge cup was inexpensive so I didn't expect anything great. I'll admit it's better than I expected. The way the gauge mounts in the cup really lacks. The gauge isn't tight at all. The mounting tab is a nice size and comes with double sided tape or you can use the pre drilled holes. The cup is plenty deep for lines or wires, enough so I cut roughly an inch off of the cup. Overall the product is mid grade and works as advertised.