Why sew 1/2" seam then trim to 1/4"?
I am in the process of making a tote bag. The instructions in several places say to sew 1/2" seam then trim to 1/4". I fail to understand why that is necessary? I mean I realize in THIS particular instructions if I changed it now the pattern size would be off. But what I don't understand is why it is necessary to begin with? It seems like extra steps. Can anyone enlighten me?