How to Sew a Hoodie & Jumpsuit Loungewear Set Without a Pattern

Lydia Naomi
by Lydia Naomi
10 Materials
4 Hours

Need some inspiration for your next sewing project? Let’s do a DIY loungewear set together! I’ll show you how to sew a hoodie and a really comfy jumpsuit!

The best part about this tutorial? You don’t even need loungewear sewing patterns! Just use your best-fitting clothes as a guide.

Tools and materials:

  • Cotton jersey fabric
  • Drawstring
  • Tank top and leggings as a guide
  • T-shirt as a guide
  • Sweater with a hood as a guide
  • Scissors
  • Pins
  • Sewing machine
  • Thread
  • Ruler and measuring tape

DIY jumpsuit

Pinning the waistband for the jumpsuit

1. Make the jumpsuit pattern

You’ll need to wear a pair of leggings and a tank top for the jumpsuit. Then, mark your desired length on the tank top with a pin. It should be at the waistband of the legging. 

Using a tank top and leggings for the pattern

Turn both items inside out. Fold the tank top so the front faces out and place the leggings with the front facing up. 

Drawing a line down the folded area

Fold your fabric along the grain and draw a line down the center of the folded area. This will be your side seam. 

Tip: It’s best to pre-shrink the fabric beforehand (wash and dry on high heat). 

Taking in the waist on the center front seam

The side seam will essentially be a fold, so take in the waist on the center front seam. 

Tracing around the clothes to get the pattern

Trace around your garments, adding some width if your fabric is less stretchy than the garments. 

Creating a square neckline

Create a square neckline so it's easy to get into and out of without having to add a zipper. 

How to make DIY loungewear

Flip over the leggings so the back faces up and that it lines up with the center line. Trace out the leg and the crotch seam. 

Cutting out the fabric pieces

2. Cut out the fabric

Cut out the front side and back bottom. 

Marking the symmetrical shape

Flip over the front and cut the mirror shape for the back (top section). Then, make two pieces and mark the back and the front for reference. 

Pinning the inseams of the pant legs

3. Sew the seams

Fold each piece and serge the pant leg inseams. If you don’t have a serger, use a zigzag stitch. 

Matching front to front and back to back

Assembling the DIY loungewear jumpsuit

Match the front and back seams and sew the entire seam. 

Sewing the shoulder seams

Before sewing the neckline, sew the shoulder seams. 

Measuring the armholes

4. Finish the edges

Measure the neckline and armholes and cut 1-inch strips in those lengths. 

Finishing the edge of the neckline

For edge finishing the neckline, start your strip at the shoulder, leaving room for seam allowance. Make a snip where it lines up with the center-front seam, center-back, and shoulder seams. 

Tip: Stretch the strips while pinning, so that the neckline doesn’t gape. 

Pinning the sewing to finish the edges

Pin and sew all around to secure. Repeat for the armholes, too. 

Clear elastic for the neckline and armholes

Sewing a clear elastic strip to the neckline

When sewing the layers, add a clear elastic strip to the neckline. Get the needle into the elastic before you lower the foot and start sewing. 

Folding the fabric to coverstitch it

Now, flip the strip under and coverstitch it. 

Hemming the pant legs

Hem the legs and press to complete. 

DIY hoodie

Using a t-shirt for the hoodie sewing pattern

1. Make the hoodie pattern

Making your own hoodie is super easy! Let’s start with a loose-fitting t-shirt. Take your fabric and fold it so there are 4 layers of fabric. On the fold, place the center front of your shirt and trace accordingly. 

Making a drop shoulder for the hoodie

Around the sleeve area, create a drop shoulder. Also, trace out the back neckline first because it is higher. Make sure the sleeve area is wide enough for your bicep with seam allowance included. 

Loungewear sewing patterns

Add length to the hoodie so that it’s at hip length. Also, create a notch for the side slits. 

Cutting out the hoodie pattern

2. Cut the fabric

Cut out the pattern and trace the front neckline on one of them and cut it out. 

Measuring sleeves for the hoodie

3. Make the sleeves

Measure your sleeve opening and transfer it to two folded strips. 

Measuring the sleeve cuffs

Decide your length and measure out half your wrist length (plus seam allowance).

Making the pattern for the sleeves

Connect these markings and cut with a 1-inch sleeve hem allowance. 

Tracing a hood for the pattern

4. Make the hood

For the hood, fold your fabric into 4 layers to create a fully lined hood. Use a hood from a sweater as a guideline.

Place the hood with the opening on the double fold. If you want the hood to overlap, add some width to the base. 

Tip: It's best if the hood you are copying is similar or the same size as the neckline. 

Cutting out the hood and pinning it

Cut and sew around the hood, leaving the bottom open. 

Marking a 1-inch line up from the fold

Iron the folds of the hood opening and mark a 1-inch line from the fold.

Sewing along the line to create a casing

Use this as a guide to sew around to create a casing. 

Inserting a drawstring into the hood casing

Mark 3 inches from the neckline on either side and feed through a drawstring. 

How to sew a hoodie

5. Sew the hoodie

Place the sweater body pieces right sides together and sew the shoulders. Then, open it up and pin the armholes to the upper sleeves. Sew to secure. 

Sewing the side seam with the slit open

Sew up the side seam. I'm leaving a side slit open

Attaching the hood to the sweater

Attach the hood, overlapping at center-front. Make sure the seams align. Then, sew to secure. 

Finishing the hem of the hoodie

To finish the hem, fold the edge back by 1 inch and zigzag stitch. Don’t forget to hem the sleeves. 

Tip: Iron the hem before stitching

Finishing the side slit

Fold the slit’s edges by a ¼ inch (twice), iron, and sew. 

Reinforcing the seam with a backstitch

Remember to reinforce the seam with a backstitch before moving down with a straight stitch.

DIY jumpsuit

DIY hoodie

DIY lounge set

DIY hoodie and jumpsuit loungewear set

Now that you’ve learned how to sew a hoodie and a beautiful DIY loungewear jumpsuit, there’s no excuse to try out this DIY for yourself.

I love how everything matches so cohesively; it’s a comfy and fabulous ensemble! Thanks for joining me and I’ll see you next time. 

Suggested materials:
  • Cotton jersey fabric
  • Drawstring
  • Tank top and leggings as a guide
See all materials

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