I ordered the 3 3/4 to go on the smaller cabinet doors under the sink and above the refrigerator.  I ordered the 5" center to center to go on the doors & drawers.  I just love the way they look.  Also, my husband was very concerned that I ordered ones with enough depth so that your hand did not slide against the paint on cabinets and wear it off in time.  His hand fits perfect inside of these.  They are perfect in every way and the price was fantastic for these heavy duty pulls.