Easy Door Push Button Indoor Use, Push to Open/Exit Auto-Reset Momentary Contact Switch, Wall Mounted Wired Release Switch for Automatic Gate Opener Door Access Control System Operator

I used this for training my service dog to use various types/styles of buttons. This worked great. It's easy to use. Reasonable size. Decently priced.

This is a little more expensive than a basic momentary switch. But, if you're looking for something that will look a lot better, this will do it. Installation was very easy as the terminals just require pushing a wire in and then tightening. I installed it to replace an old switch for my garage door opener.NOTE: this switch is not a flush mount (see photo). You need to have or make a wall opening large enough for the terminal block to fit in (about 1.5 inch square).