Because I've lost weight my swimsuit leg openings are too large. The body is
fine - it was too tight before :-)
So I need to sew some elastic on the leg openings and I wondered if there
was a formula for estimating the length I'll need.
I don't want to end up with blue legs due to restricted circulation. It will
be cold enough in the open air pool on the liner on our Arctic cruise :-)
large. The body is
wondered if there
circulation. It will
I had a similar curiosity and interest as well. I researched a
bit on the web and searched through my sewing library and came
up with following info.
The length of elastic is determined by the **percentage of
stretch** you need for your application.
The percentage of stretch depends on the application, width and
type of elastic used.
The total range of stretch used in many applications is between
10 - 30 %
length of elastic = (circumfrence of leg at the opening -
percentage of stretch) + sew allowance
One method to determine percentage of stretch to use ...
if you trust the swim wear manufacturer you can calculate the
stretch they used in the swim suit and use that ?
by measuring the relaxed diameter of the leg opening, then
measure the stretched leg opening and then compare results to
determine the percentage of stretch used.
well the gurus will chime in soon and i can see how close i was
to the gurus advice :)
I always measure elastic directly on my body, and cut off the amount
that feels right.
But then I always run elastic through a casing (can't stand the feel
of elastic on my skin), so the stretch isn't changed by installing it.
Don't forget seam or knot allowance, if needed.