These crystal knobs are beautiful but a little too small for my liking. I still would of kept them if the knobs would of fit tight. The Knobs comes with 2 different screws but it wouldn't fit to my existing cabinets. The fit was too loose. I tried using the screws that came with my existing vanity but it still didn't fit. 
So would I recommend these knobs? Yes, BUT it really depends if your cabinets are a good match for the knobs. 
Trail and Error. 

Florida