The 1/4 inch Right Guide Foot is designed to help you achieve perfect 1/4 inch seams when piecing. Simply keep the fabric edge next to the guide. The distance between the needle and the right guide is 1/4 inch. 

 

The 1/4 inch Right Guide Foot also gives a perfect 1/4 inch topstitch distance from the edge of a block when stitching the blocks, batting and backing together.