Regardless of the technique we use or how carefully we work with fabric patches, there are bound to be slight irregularities in seam allowance or minor distortion in the fabrics. To correct these problems, it is a good idea to start with slightly oversize patches and square up the subunit to the correct measurement. I usually start with 1/8th to 1/4th inch oversize patches. Once constructed, there is a little to trim off when squaring to the correct measurement for the subunit.
Flying geese units often have more issues with construction than other units, especially if made with the traditional method using triangles. Newer techniques help minimize the problems, but it is still a good idea to square up the subunits. (See “The Best Flying Geese Technique I Know!)
There are several rulers on the market designed to easily square up flying geese units. All will help preserve the ¼” seam allowance and keep the points from being trimmed off. Some, however, only work with one or two sizes of flying geese. Studio 180 Design, however, has, what I think, is the best flying geese ruler on the market. It is called Wing Clipper. With it you can square up flying geese units from 1”x1 ½” to 5 ½” x 10 ½” in half inch increments. There is also Wing Clipper II for squaring in ¼” and ¾” measurements.
I have used Wing Clipper for a number of projects and really appreciate how easy it is to use and how beautiful the flying geese units looks when squared up correctly with this ruler. Click to see a video demonstrating the Wing Clipper. If you can’t find this ruler at your quilt store, you can order it on line from Studio 180 Design. The ruler comes with excellent directions for both left hand and right hand cutting and a chart with cutting instructions for all of the sizes you can trim using the ruler.