Any place or thing in the universe can be up to 104% perfect. That’s how we got this newest free sewing pattern based on Janet’s iconic outfit from NBC’s The Good Place. Envelop yourself in Janet’s sunshiny personality as well has her adorable vest and skirt with this cosplay and be sure to visit our Onella Blouse post for details on her shirt and screen accurate fabric!

Purchase Materials Used Below:
  • 5 yards Purple Stretch Polyester Crepe
  • 2 yards White Warp Fusible Interfacing
  • 7 Black Plastic 4-Hole Buttons
  • MDF168 – The Janet Cosplay Sewing Pattern (free download below!)

Note: This post features pattern and instructions for Janet’s vest and skirt. For details on the shirt and screen accurate fabric, visit our Onella Blouse pattern!

Alternative Recommended Fabrics:
  • Suiting
  • Crepe de Chine
  • Sateen
  • Twill



All seam allowances are 1/2″ unless otherwise stated. See chart below for sizing specifications. Note, this specific pattern is available up to a size 30.

Note, this downloadable pattern features printable pieces for Janet’s vest only. Her skirt was made using the 1/4 and Midi options on Mood’s Circle Skirt Calculator. For a printable pattern of her shirt, visit our Onella Blouse!


Before you start sewing, I recommend interfacing all of your main vest pieces. This will make them a bit more crisp and clean when your vest is complete!

Begin sewing your vest by adding your darts, making sure to follow the guidelines on your pattern.

Sew your vest lining as you sew your main vest layer.

Connect your vest pieces at the vertical seams, starting at the center back and working your way to the side and subsequent princess seams. These should be sewn as regular seams with fabric faces together.

When complete, clip your seam allowance at the curves, like you see above, and press your seams open and repeat with your lining layer.

Insert your welt pockets into the main layer of your vest, following the marks on your pattern. If you’re unfamiliar with how to sew a welt pocket, visit this tutorial!

Next, sew the front and back of your vest together at the shoulder seams, like you see above. Clip the seam allowance in the corner at a 45 degree angle toward your stitching. Repeat with your lining.

Like you see below, sew along the center back seam of your vest lapel and then press your seam open. Align the lapel seam with the center back seam of your vest and sew along the neckline, meeting your shoulder seams at either end. Repeat with your lining again.

To complete your vest, pin your lining to the main layer with the faces together. Sew around the outside of your garment, leaving a few inches open near the back to pull it right-side-out. Press, slip-stitch your opening closed, and edge-stitch around the entirety of the vest.

Add on your buttons and corresponding buttonholes and your new costume is ready to wear!

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