Free pattern and tutorial kids underwear (size 2T - 14Y)

* Knit fabric (Liandlo/Znok/Spoonflower/Alice Apple) - 40 cm x 30 cm (16 inch x 12 inch)
* Foldover elastic - 2,5 cm x 50 cm (1 inch x 20 inch)

Download the free sewing pattern from the list below. Set your printer settings to A4 paper.

Girls briefs (size 86 / 92) (US 18 months/ 2T)
Girls briefs (size 104) (US 4Y)
Girls briefs (size 110 / 116) (US 5Y/ 6Y)
Girls boxer briefs (size 98/104) (US 3T/ 4Y)
Girls boxer briefs (size 1110/116) (US 5Y/ 6Y)
Girls boxer briefs (size 122/128) (US 7Y/ 8Y)
Girls boxer briefs (size 134/140) (US 9Y/ 10Y)
Girls boxer briefs (size 146-152) (US 11Y/ 12Y)
Girls boxer briefs (size 158/164) (US 13Y/ 14Y)

For the girls boxer briefs follow these instructions.

When working with knits, it is important not to stretch or pull the fabric while sewing. Also use a stretch needle and a stretch stitch. In this tutorial all seams are sewed with a twin needle.

Double-click images to enlarge.

Step 1: Draw the pattern.
Draw the pattern with an aqua trickmarker on the back of the fabric. The pattern is without seam allowance. Add 1 cm (5/8 inch) seam allowance. Draw the top of the underpants and the sides of one bottom piece without seam allowance.

Cut a front piece, a back piece and two bottoms out of the fabric. 

Step 2: Draw two lines with an aqua trickmarker.
Draw on the front of one bottom piece two lines (marked orange) with an aqua trickmarker. These are the same lines as at the back of the fabric.

Step 3: Pin together.
Pin the two bottom parts together with wrong sides facing. Do not pin on the sewing line, but about 1 cm (1/2 inch) above and beneath the sewing line (marked orange).

Step 4: Pin the bottom pieces to the front piece.
With right sides facing, pin the bottom pieces to the front piece (on sewing line).

Step 5: Sew together.
Sew together.

Step 6: Trim.
Trim. Place the underpants right-side down on your work surface.

Step 7: Pin the bottom pieces to the back piece.
With right sides facing, pin the bottom pieces to the back piece (on sewing line).

Step 8: Sew together.
Sew together.

Step 9: Trim. 
Trim. Place the underpants right-side down on your work surface.

Step 10: Sew the sides.
Pin the front piece to the back piece, with right sides facing. Sew the sides of the underpants. Trim.

Step 11: Fold the seam allowance to the inside.
Fold the seam allowance of the leg holes to the inside and pin down.

Step 12: Sew leg holes.
Turn your underpants right side out. Sew leg holes about 1 cm (5/8 inch) from the outer edge. Trim.

Step 13: Fold the foldover elastic in half.
With right sides facing, fold the foldover elastic in half. Make a circle with a circumference of 38 cm (15 inch) for size 24 months/2T, 39 cm (15,4 inch) for size 3T/4Y or 41 cm (16,1 inch) for size 5Y/6Y. Sew together.

Step 14: Sew.
With wrong sides facing, pin the foldover elastic to the underpants. Fold the foldover elastic in half length-wise, over the edge of the underpants and pin down. Sew together.

© small dreamfactory
not intended for commercial use


  1. hello,
    is the underwear pattern only for girls?

  2. Unfortunately underwear for boys need to be a little different at the front :)

  3. hej there :)
    these are so sweet! i'm about to start on the first one just now and am excited to see the product!
    another thing: does anyone know where to find an equally beautiful pattern for boys briefs?
    well, a big thanx for sharing and all the best!

  4. german freebook (with foto's showing the single steps) for boy's briefs:
    You have to add allowances, except for the leg holes.

  5. I don´t understand, the pdfpatterns does not look the same as the pattern that you are showing here? Look at the frontpiece...


    1. Hi Swofia, because this tutorial is nearly the same as the tutorial for the women's briefs, I converted the tutorial for the women's briefs into a tutorial for sewing kids underwear. I didn't change the shape of the pattern, therefore the tutorial doesn't match with the pdf-pattern.

  6. These are amazing! I love the way my fabric design works with the 1970s style underwear...thanks for using my fabric :) :) x

  7. The pictures at the top appear to use FOE for the legs. If I do use FOE for the legs should I leave the seam allowance for the legs off. Similar to the waistband?

    1. No, you just fold it over the edge. I used jersey at the pictures above (not recommended).

  8. Oh I would love a pattern for boys too... Hint hint. Thanks for a great blog and great patterns.