What is "square?" A square is a polygon with 4 sides equal in length and the corners are 90 degrees.
Something (like a quilt) is considered "square" if it is a four sided polygon and has four 90 degree corners. If your quilt is "square" it has four 90 degree corners and it will lie flat.
Another interesting fact: if your quilt is "square" the measurement from diagonal corners will be the same.
To use a fabric panel like this first it has to be trimmed until it is "square," which is no small feat.
Here I have trimmed the bird panel so it is square and added a strip of fabric to all four sides. NOW I can add the feathered fabric all around.Your quilt being "square" is a very big deal. As I have said before, if a quilt is square it will lie flat as a pancake and there will be no wobbles or ripples and your long arm quilter will love you.
Your quilt will be "square" if each of your blocks is square. Many people think my quilts are paper pieced. I really couldn't figure out why for a long time, but now I know it is because my work looks perfect and lies nice and flat. How do I do it? I trim every edge straight and make sure every panel, block or whatever, is "square before I sew components together. And even after I do THAT, I make sure the result is "square."
Very. Big. Deal.
Worth. The. Fuss.