Little gadgets and notions - Sewing/stitch gauge

I have not actually used this yet, so time will tell if it works. I have tried a magnetic one, but not enough metal on mine to make it useful.
The backs are tacky, and you can wash them and it becomes tacky again, clearly not tested that either!  I was just going to stick tape on for various hems, but this seems to be a good solution in theory, I got it from Amazon - Quilted Bear.

I do use the 1/4 inch foot from time to time if I am trying to be accurate!