sewseamless

Using a safety pin, or a bodkin if you have one, insert elastic into the casing until it comes out the other side. Most
patterns will instruct you on how much elastic to cut. On many patterns, it is the waist measurement plus one inch.
I have always done this my own way, and that is what I'm sharing with you here. I insert the elastic until it is all the
way through, and then I cut the excess off and overlap it somewhat, enclosing it in a piece of scrap fabric. I zigzag
the fabric over the overlapped elastic and then enclose the elastic in the casing. I stretch the elastic a bit while
sewing the casing closed.

I tried to get a picture of
zigzagging the fabric scrap
over the elastic, but it
turned out too light. In the
picture above, the next step
would be to wrap the fabric
around the overlapped
elastic and zigzag. Then
insert the elastic into the
casing as shown in the
picture on the left.