Step 1:
Sew your corner nicely. For thinner fabrics a perfect corner, pivoting around the needle like the left one. Thicker fabrics need a bit more room, so pivot twice, using a stitch as the corner like the sample on the right.
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Step 2:
Trim the seams down to a minimal width, and clip the corner.
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Step3:
Holding the corner like this, use your fingers to fold down the seam allowance so that it folds inside out nicely, instead of crumpling up inside.
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The corner should look like this after you turn it right side out.
Not very sharp, right? But a good start, since there's no excess fabric inside clogging up the corner.
Step 4:
Insert your snips (or a small pair of embroidery scissors), on the inside of the corner and push out. Not too hard, you don't want to pierce through!
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Step 5:
Pinch the corner a little bit to finish off the shaping.
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Done!
Beautiful corners!
As you can see below, the one on the left isn't quite shaped right, it's a bit stretched. That's because it was sewn with the corner for thin fabric, but on thick twill, which needs the thick fabric cornering. Clear as mud?
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Happy sewing!
xCherry
www.FuriousKingston.com.au