Your fabric should look like a triangle at the end and the seam should run down its center. Both layers of fabric should now be pointing in opposite directions instead of laying flat together.
If your pattern doesn’t give you a measurement, choose your own measurement. For example, if you’d like a short box, measure only 1⁄2 inch (1. 3 cm) from the top. To make a wide box, measure 2 to 4 inches (5. 1 to 10. 2 cm) from the top.
Once you draw the line, it will look like the base of a triangle.
The backstitches will support the corners. This is especially important if you’ll be stuffing the item.
You’ll now have a box corner that will give depth and support to your item.
You shouldn’t see the raw edges of the fabric after you’ve made the second fold.
Ironing will keep the fabric in place and create a crease so you can sew the corners easier.
For example, if you want a 1 inch (2. 5 cm) border, multiply 1 inch (2. 5 cm) by 2 to get 2 inches (5. 1 cm). Measure and mark a 2 inches (5. 1 cm) distance from each corner. If pencil won’t show up on your fabric, use a pen.
This will create a 45-degree angle.
Remember to do this for each of your corners.
Sewing a few backstitches at the beginning and end of the line will prevent the stitches from unraveling.
Ensure that you don’t cut too closely to the seam or the stitches might become loose.
