How do you sew a box corner?

How do you make fabric corners?

How to sew mitered corners

  1. When hemming two edges that meet, the multiple folds along each edge pile up on top of each other and create an excess of fabric at the corner. …
  2. Press the same amount again. …
  3. Unfold everything.
  4. Find the middle square formed by the folds. …
  5. Trim along line.
  6. Fold angled edge in so that the creases line up with each other.


How do you calculate box corners?

How Boxing the Bottom Corners Affects the Bag Size

  1. Bag size before boxing corners: 19″ W x 16″ H (flat bag has zero depth)
  2. Bag size after boxing corners: 15″ W x 14″ H x 4″ D.
  3. Width is the length of the remaining seam across the bag bottom: 19″ – 4″ = 15″
  4. Height is the length of the remaining side seam: 16″ – 2″ = 14″

What is the best way to make a 90 degree turn when sewing?

For a 90 degree angle, just snip the point of the corner off. If your seam allowance is wider than 1/4 inch (6mm) you can trim a bit off the sides at an angle too. For narrow seam allowances, this is not usually necessary.

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