When working with squares this small it is important to have an accurate seam allowance. Every time I start a project, I line my needle up using a seam allowance ruler (I did try the one with the seam allowance guide, but it did not work well for quarter-inch seams on my machine due to the placement of the feed dogs.) I have also been using this quarter-inch foot with the guide. (just choose one that fits your machine.) I still use the seam allowance ruler with this foot and I find that I do still have to move my needle over just a bit for a perfect quarter-inch seam allowance. However, once I have made the adjustment, the guide helps keep all my seams perfectly aligned.