---
title: 'Shin swim trunks: Sewing Instructions'
sidebar_label: Sewing Instructions
sidebar_position: 20
---
## Step 1: Join the backs
Put your two backs on top of each other with the good sides together, and sew
them together along the center back seam.
## Step 2: Join the fronts
### Sew the front seam
Put two of your fronts on top of each other with the good sides together, and
sew them together along the center front seam.
Repeat with the two other fronts so you have two identical sets.
### Baste fronts together
We have 4 fronts because we'll have a double layer at the front of our swim
trunks.
Since swimwear fabric tends to be slippery, it's a good idea to baste your
fronts together to make it easier to work with them in the next steps.
So place your fronts on top of each other, with good sides out, and sew them
together with some large basting stitches in the seam allowance.
## Step 3: Join the sides
Place your back down with the good side up, and place your double front layer
on top. Sew fronts and back together at the side seams.
## Step 4: Sew the cross seams
Keep your swim trunks with the good side inwards (the back at least, the front
has good side on both sides) and sew the crossseam to create the leg openings.
## Step 5: Place eyelets for the draw string
Mark the middle of your waistband length. Fold the waistband double, and mark
the middle of the width (do not take the seam allowance into account).
A bit to the left and right of this, you can add two eyelets to pass a
drawstring through. This will avoid an embarrassing situation when you go for
that big dive and now suddenly find your swim trunks on your ankles.
:::note It's best to add some reinforcement
As swimwear fabric is slippery and thin, you might want to add some
reinforcement behind these eyelets. A leftover piece of denim will do just
fine.
:::
## Step 6: Prepare the elastic
There's no magic formula for the length of your elastic. So you wrap it around
your waist and pull it tight until you get a good fit.
Mark this length, cut the elastic, and join the two ends together.
## Step 7: Join the waistband
Fold the waistband in half with good sides together and line of the (short)
edges. Sew them together.
## Step 8: Attach the waistband
Fold your waistband double along the length with good sides out, and place the
elastic inside. Make sure to align the place where the elastic is joined with
the place the waistband is joined.
Align the back of your swim trunks with the place where you joined the
waistband, align the edge of the waistband with the edge of the back, and pin
them together. Make certain that you pin it to the bad side of the back.
:::note Mind your eyelets
If you've made eyelets in your waistband, double check that they are placed
towards the outside, not the inside of your waistband.
:::
Find the front of the waistband (easy if there's eyelets, if not just fold it
double) and align that with the front seam. Pin this in place too.
Now make your way around the swim trunks waist, pinning the waistband in place.
Then, sew the waistband to the swim trunks, as close to the elastic as you can,
but don't sew into the elastic.
It's fine to not sew too close the first time around, and once your elastic is
attached and encased, make a second round to sew it a bit more snugly.
## Step 9: Hem the legs
Fold the hem upwards, and sew it down. If you have a coverlock, use it.
If not, use a twin needle or zig-zag stitch to keep the seam stretchable.
:::tip Fold only once, to avoid bulk
Swimwear fabric doesn't ravel, so you can simply fold this over once and sew it
down, then neatly trim back the fabric.
:::
## Step 10: Thread a draw string around the waist
Thread a drawstring through one eyelet, around the waist, and out of the other
eyelet.
That's it, you're done 👍
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