For your convenience I decided to offer the complete tutorial as a PDF for download for only $2, if you prefer to have everything in one structured document ---
Another one of my sewing projects is done! A friend of mine had this really big t-shirt and she asked me if I could turn it into a dress for her. This was a really nice opportunity to use my serger again and was easier than I thought.
I only did the tracing on one side of the shirt.
Then it was time to cut off the additional fabric on that side. This is always the part the makes me a little most. After all, this is not my own shirt. Don't want to mess up now.
I simply folded the shirt in half and traced the other side with a fabric marker as well. This way I made sure both sides are even.
For the new sleeves I actually looked through my paper patterns and took a sleeve pattern piece from a knit dress that seemed to be perfect to be used for the new sleeves. If you want to make sure the sleeve fits exactly into the armhole, measure the width of the armhole and adjust the width of the sleeve before cutting.
You can also go with a wider sleeve and gather it a little at the rounded top edge like you normally do, especially when sewing with cotton fabrics (e. g. a blouse). The only thing you want to avoid is having the width of the sleeve be smaller then the width of the armhole.
I took one of the shirt sleeves that I had cut off, folded my paper pattern piece in half and put it on top, the opening of both pieces matching. Then I traced around the paper sleeve and cut along this line.
With your serger or using a stretch stitch on your regular sewing machine, sew the sleeve together again at its short bottom edges. Repeat for the second sleeve.
Then stitch around the sleeve.
I cut off the neck trim to make the neckline bigger, then simply folded it down to the wrong side by approx. 1 cm (3/8") and used lots of pins to hold everything in place. Using my regular sewing machine and a twin needle I stitch all along the neckline.
I hope you enjoyed this tutorial. If you have any questions feel free to leave me a comment. Have you made a similar project? I would love to know :)