Sew Your Own Pajama Pants Without a Pattern

Modified: Nov 11, 2025 · Published: Nov 25, 2019 by Brandy · This post may contain affiliate links.

How to sew pajamas without a pattern! This method is ideal for making pajama pants for kids. Simply use an existing pair of pajama pants as a guide.

You might also like my favorite 1-hour nightgown pattern, soft-soled baby shoes pattern, or homemade dinosaur hoodie.

White pajama pants with black dogs on the front.

I like sewing pajama pants like this for my kids because it eliminates the guesswork. Printed PDF sewing patterns and the finished measurements have been hit-and-miss for me, but these pajama pants work! I’ve been making pajama pants and pants for Halloween costumes using this method for years. It's one of the most popular tutorials on the blog because it's so simple!

Why I Like This Tutorial

Simple to follow. Not only do I provide step-by-step photos and instructions, but I also provide a video for you to follow!
Quick project. This is a very quick sewing project. You can easily make a pair of pants in 30-60 minutes.
Inexpensive. You don't need to purchase a pattern; just use a pair of pajama pants that you already have as a guide. It's ok if the existing pair is a little too small. You can adjust the hem to be longer and add width if needed.

What Others Are Saying

This was so fun! I’ve sewed NOTHING before and this came out perfectly and took such a short amount of time!---Sarah

It all worked brilliantly! The instructions and photos are so clear, and easy to follow. I'm really pleased with the result! Many thanks!---Kate

I just wanted to tell you thank you for explaining the steps on how to sew the crotch.. it just came out much better from you than any tutorial I've seen, you explained it pretty well.---Amanda

Jump to:

Why I Like This Tutorial
What Others Are Saying
Tips and Tricks
Supplies
How To Make Pajama Pants Without a Pattern
Homemade Pajama Pants FAQs
More Clothes To Sew
Easy Pajama Pants Without a Pattern

Tips and Tricks

Use this method for children. If you look at store-bought toddler-big kid pajama pants you’ll notice that they look exactly like the ones that I am showing you how to make today. They are cut on the fold, without outer side seams, and are made out of 2 pieces of fabric. The front of the pants looks identical to the back.
Don't use this method for adults. If you look at a teen-adult pair of pajama pants, you’ll notice they are made using 4 pieces of fabric and have side seams, as well as inner seams. The back is a bit baggier than the front, allowing for curves, hips, and more movement. For this reason I’d recommend using a pdf pajama pants pattern for the right size and best fit for curvier shapes. That being said, many exprienced sewers have used my method for adults, adding extra room in the waist and hips with great results. For beginners, I'd suggest using a pattern.

If you are looking to make basic elastic waistband pajama pants for toddlers, all the way up to big kids, without pattern pieces to cut out or pockets to sew let’s get started!

Supplies

Existing pair of pajama or lounge pants
Fabric: Cotton and flannel work well.
Scissors
Pins
¾" Elastic
Sewing machine or serger
Thread
Measuring tape

How To Make Pajama Pants Without a Pattern

Pair of pajama pants laying on top of flannel fabric.

Step 1: Fold existing pajama pants in half. If necessary, iron to ensure you have the right shape. Lay the fold of the pants on the fold of the fabric. Pull the crotch area out a bit so that it is pointy.

Two unsewn leg sections of pajama pants are on the table.

Step 2: Cut 2 pieces (one for each leg) on the fold, using your old pair as a guide (you can trace the cutting line onto the fabric before cutting if you'd like).

Cutting Guide

Leave at least ½" for seam allowances on the sides.
Add 3" on the top for the elastic casing.
Add 1" for the bottom hem (can make it larger or smaller if you want).
Be generous when cutting around the crotch area (where the back comes to a point) so that there is plenty of room to bend over and move around without stressing the seam. I usually go at least an inch away instead of ½" for the seam allowance in the crotch area.

Note: Since you are using an existing pair of pajamas, the elastic waist is already scrunched. You can also add an inch or so to the cutting area if you'd like for a bit of extra room. If the existing pajama pants are shorter than you'd like, add length when cutting out the pieces. If they are too narrow, add a larger seam allowance when cutting out the pants.

Two pant legs. One right side out and one inside out.

Step 3: Fold them inside out and sew (straight or zig-zag stitch) along outer leg length edge (from the bottom, to where the crotch begins to curve). Trim close to seams.

Pant leg inside another pant leg, unsewn.

Step 4: Turn one pant leg right side out and stuff it inside the other pant leg. Right sides of the fabric will be facing each other. Make sure that the long seam that you just sewed on each leg matches the other.

Step 5: Pin in the center to keep it in place.

Sewing your own pajama pants is easier without a pattern for a perfect fitting pair every time!

Step 6: Sew the crotch seam of the pajama pants using a ⅜" seam allowance. Begin at the waist, sew along, and end at the top again. Sew once more close to the seam line to reinforce, since this area will get a lot of wear.

Step 7: Turn pajama pants right side out.

Waistband being sewn with sewing machine.

Step 8: The length of the elastic should be the same size as your child's waist + 1".

Fold down the waist ¼" inch and press it.

Fold it another 1 ¼ inch and sew the casing all the way around with a ¼" seam, also leaving a 2" gap to insert the elastic into later.

Step 9: Insert your elastic through the waistband using a safety pin to help guide it. Feed the elastic all the way through and out the other side of the opening.

Step 10: Sew the ends of the elastic together. Stretch the waist, pulling the elastic back into the opening.

Sew the gap in the waist closed.

Bottom of pants being hemmed on sewing machine.

Step 11: Fold the bottom hem up and press, then fold it up one more time and press. (This one is about ½"). Sew around on both legs. Flannel is so easy to work with. You don't need pins since it pretty much just sticks together.

Homemade Pajama Pants FAQs

What fabrics work best for homemade pajama pants?

Lightweight fabrics like cotton and flannel are easy to work with and work well for homemade pajama pants. Knit is also a good choice, but it isn't as easy to sew as cotton.

Do you need a pattern to make pajama pants?

You do not need a pattern to make children's pajama pants, but you do need an existing pair of pajama pants to use as a cutting guide.

Can you make adult pajama pants with no pattern?

You can use this method for making adult pajama pants, but you will need to add a larger seam allowance in the hips and waist. This is not a standard measurement, as everyone's shape is different. You will need to adjust to your own measurements.

More Clothes To Sew

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Easy Pajama Pants Without a Pattern

How to sew pajamas without a pattern! This method is ideal for making pajama pants for kids. Simply use an existing pair of pajama pants as a guide.

Pin Recipe

Prep Time15

Active Time45

Total Time1

Yield: pair

Author: Brandy Nelson

Cost: Under $10

Equipment

scissors
pins
measuring tape
sewing machine

Materials

Existing pair of pants
Flannel or cotton fabric
¾" wide elastic cut to waist measurement

Instructions

Use a pair of pajama pants that you already have and fold them in half. Iron if necessary to make sure you have the right shape.
Lay the fold of the pants on the fold of the fabric.
Pull the crotch area out a bit so that it is pointy.
Cut 2 pieces (one for each leg) on the fold, using your old pair as a guide (you can trace the cutting line onto the fabric before cutting if you'd like).
Note: Follow the CUTTING GUIDE in the notes section.
Fold them inside out and sew (straight or zig-zag stitch) along outer leg length edge (from the bottom, to where the crotch begins to curve). Trim close to seams.
Turn one pant leg right side out and stuff it inside the other pant leg. Right sides of the fabric will be facing each other. Make sure that the long seam that you just sewed on each leg matches the other.
Pin in the center to keep it in place.
Sew the crotch seam of the pajama pants using a ⅜" seam allowance. Begin at the waist, sew along, and end at the top again. Sew once more close to the seam line to reinforce, since this area will get a lot of wear.
Turn pajama pants right side out.
The length of the elastic should be the same size as your child's waist + 1".
Fold down the waist ¼" inch and press it.
Fold it another 1 ¼ inch and sew the casing all the way around with a ¼" seam, also leaving a 2" gap to insert the elastic into later.
Insert your elastic through the waistband using a safety pin to help guide it. Feed the elastic all the way through and out the other side of the opening.
Sew the ends of the elastic together. Stretch the waist, pulling the elastic back into the opening.
Sew the gap in the waist closed.
Fold the bottom hem up and press, then fold it up one more time and press. (This one is about ½"). Sew around on both legs. Flannel is so easy to work with. You don't need pins since it pretty much just sticks together.

Video

Notes