DIY Ruffle Sweatshirt From Scratch

by AssunDIY
11 Materials
2 Hours

Make a unique sweatshirt with this ruffle sleeve sweatshirt tutorial. Show your true colors in this fabulous DIY top that is simple to make and so much fun to wear. Keep reading for step-by-step instructions.

Tools and materials:

  • Sweatshirt (to trace)
  • Paper
  • Pen
  • Scissors
  • Sweatshirt fabric
  • Wide strip of ribbed fabric (match color to sweatshirt)
  • Three wide strips of colored ribbed fabric
  • Pins
  • Ruler
  • Sewing machine
  • Serger (optional)
DIY ruffle sweatshirt

Draw and cut

See 0:40-2:58 in the video for instructions on how to draw the sweatshirt pattern and cut out all the pieces. 

Sew a ruffle sweatshirt


Zigzag stitch the asymmetrical edges of the back pieces, and the side edges of the sleeves.

Make a ruffle sweatshirt


Use a gathering foot on your sewing machine to gather one edge of each of the ribbed fabric strips.

How to sew a ruffle sweatshirt


Starting from 2 centimeters (¾ of an inch) above the bottom of the sleeve, pin one ribbed strip to the edge of one of the half sleeve pieces. Cut off any excess ribbed fabric.

How to make a ruffle sweatshirt

Pin and sew

With right sides together, pin the second half of the sleeve to the first, with the ruffle sandwiched in the middle, and sew down both side seams of the sleeve.


Repeat the process with the whole sleeve piece, folding the sleeve in half, and sewing only the edge with ribbed fabric pinned in between it.

Easy ruffle sweatshirt

Pin and sew

Pin the last ruffle along the top edge of the bottom back piece, and then lay the top back piece on top with the ruffle sandwiched in the middle, and sew all the layers together.

Basic ruffle sweatshirt

Pin and sew

With right sides facing, pin and sew the front and back pieces at the shoulder seams.

Ruffle sweatshirt tutorial

Measure, mark, and sew

Measure and mark 7 centimeters (2¾ inches) from the bottom of the shirt. Pin the side seams together, stopping at the 7-centimeter mark, and sew down the seams till that point.

Ruffle sleeve sweatshirt

Zigzag stitch

Zigzag stitch the seam allowances, as well as the raw edges of the slits on the sides of the sweatshirt. 

Pin and sew

Fold the edges of the side slits inward, pin them, and sew them down.

Zigzag and hem

Zigzag stitch the raw edges at the bottom of the sweatshirt. Then, fold up the hem once, and sew it down.


With right sides together, pin the sleeves in place. Pin the ends of the ruffles together, as well. 


Sew the sleeves in place.


From the black ribbed fabric, cut two 21 x 11 centimeter (8¼ x 4½ inches) rectangles, and one rectangle that is 8 centimeters (3 inches) wide, and about 80% of the length of the neckline of your sweatshirt. 


Fold each rectangle in half and sew the short sides together on each one.


Fold each circle so the seam is on the inside, and pin the raw edges together.


Mark the quarter points on each circle.


Pin the cuffs in place, using the quarter points you marked as a guide. Stretch the fabric between the pins to make the cuff wide to fit in the sleeve.

Do the same for the neckband.


Then sew the cuffs and neckband in place and zigzag stitch the seam allowances.


Topstitch around the seam of the neckline, and you’re done!

How adorable, right? If you use this tutorial to make a ruffle sweatshirt of your own, I would love to see the results!

Suggested materials:
  • Sweatshirt
  • Paper
  • Pen
See all materials

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