Sewing curves successfully is a matter of patience and skill. Joining rounded shapes with accuracy will allow you to end up with an elegant and attractive curve.
No matter what material you are using, this easy tutorial will help you sew any size of rounded shape. Some examples include; curves on rounded bags, bag or backpack bottoms, pockets, collars, and hats.
For this sewing tutorial, I am going to be using a test bag. I am making a new bag pattern and this is going to be my prototype for the pattern, to make sure it works and all pieces fit well.
The bottom will have a rounded, but elongated shape.
These tips will work with making a complete circle as well. This tutorial is intended for beginners and those of you who have a hard time sewing curves.
Instructions for Sewing Curves Successfully
Place the piece with the straight edge print side up.
Fold the piece in half and mark the middle with a fabric marker.
Do the same with the rounded piece. Fold one way and then the other to make four marks on the top, bottom, left, and right.
Using a ruler, make marks at the same distance from each other. That way the marks will match no matter where you start sewing.
Place the piece with the straight edge print side up. Place the rounded piece print side down on top matching the center marks.
Walk the rounded piece 3/8″ at a time.
Make marks both on the straight edge piece and the curved piece until you reach the seam-allowance.
Your pattern will tell you what is the seam allowance. In my case, it is 3/8″ (1cm). If I was sewing curves within a circle, I might even make closer marks to avoid loosening the seam of the circle. You can really see the bad effects of not doing this on cheaply made bags.
What you are looking for is a smooth curve.
There are two ways to make the seam allowance lay flat and to make the curve smoother. You can clip the seam allowance making notches 3/8″ at a time or just reduce the seam allowance by cutting 1/8″ off.
Now it's your turn to practice sewing curves
This is a valuable skill that's worth mastering.
Until next time and Happy Sewing!