How to Make a Cute DIY Square Neck Top Out of a Long-Sleeved T-Shirt

Your Girl Maeia
by Your Girl Maeia
7 Materials
30 Minutes

So, I had a long top that was super boring. I decided to transform it into a DIY square top with just a few easy alterations.

If you want to know how to make a square top using something you already have on hand, keep reading to get the full tutorial plus useful sewing tips! I can’t wait for you to see the results! Goodbye, boring top!

Tools and materials:

  • Long-sleeved top
  • Sewing machine
  • Scissors
  • Matching thread
  • Ruler
  • Marker
  • Pins
Black top before the DIY

Shortening the sleeves of the top

1. Cut the sleeves

With a marker and ruler, measure your desired length for the sleeves, mark it down, and cut away with no regrets! 

Using the cut sleeve as a pattern for the opposite side

Repeat the process on the other side. To get the sleeve size symmetrical, place the cut-out excess sleeve on the other sleeve and use it as a guide when cutting.

How to make a square neck top

2. Mark the square neckline

Ok, it’s time to cut the neckline for this DIY square neck top.

Using a ruler and marker, draw a line across the chest, right under the collar area. Try not to go too low as you may have fabric flopping over in front. 

Tip: Make sure this line is centered, and both ends of the lines are X inches away from the sides of the top, respectively. 

Marking the DIY square neck top

When drawing up the sides, slightly slant the line outward on each side. 

Cutting out the DIY square neck top

3. Cut out the neckline

Cut along the marked lines and through both layers. 

Making a snip on the inner corners

Then, make a tiny snip on each corner, as shown. 

How to sew a square neckline with a sewing machine

4. Hem the raw edges

It’s time to finish off the neckline. Before you get started, set your machine to the same setting as mine (number 10 as shown above). Also, make sure to fold your top wrong sides out. 

Folding the raw edges over to hem

Fold the raw edge over once (to the right side) and place pins as you go along. Now, sew all around to secure the hem. 

Hand-sewing the new square neckline

I had a little mishap while sewing. Unfortunately, the top’s fabric was not compatible with my machine and my footer broke. I had to hand stitch the rest of the hem.

So, be sure your fabric is compatible before making the same mistake as me. 

How to make a DIY square neck top

It was a little tedious doing the hem by hand, but I finally got it done! 

DIY square neck top

DIY square neck top tutorial

From plain and boring to a fabulous and stylish DIY square neck top! I loved this process, and it was really straightforward to make.

I hope you now have the inspiration on how to make a square neck top from an old unused top. Thanks for joining me, and good luck! 

Suggested materials:
  • Long-sleeved top
  • Sewing machine
  • Scissors
See all materials

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