I wanted to show something unique about the Quarter Inch foot. At least on the Bernina Quarter Inch foot. Not only is the width of each side of the foot 1/4", but the foot also has notches on it. It has 2 notches on in front both sides that is 1/4" from the needle, and another set of notches on the back that marks a 1/4" from the needle to towards the back. These notches are helpful when you are sewing miters, binding, turning a corner, or especially "Y seams". Discussion of Y seams won't happen for awhile as they are for the more experienced quilter.
So when shopping for your Quarter Inch foot, check it out to see if it has any Notches on it!