I started with this existing romper, just for measurement. It is size 12-18 months, which is a little smaller than my little lady needs, so I knew I was planning for something bigger. I also knew I would be adding an elastic waistband, so that would give me a lot of sizing flexibility. This tutorial is for variation A, which will have tie straps at the shoulders, an elastic waistband, and wide-leg shorts.
I folded the romper in half, lengthwise, and set it against the edge of a large piece of paper. I folded the straps for the arms down because I plan to add them later.
I traced loosely around the romper, adding at least an inch around for seam allowances, and more on the bottom to extend the length for a larger size.
*I will add a downloadable pattern asap.*
Next, I laid this pattern on the fold of the fabric and cut 2.
You should have 2 pieces of fabric that are shaped like the above.
Pin and sew the two sides of the romper, right sides together. I sewed a straight stitch and then went over the edge with a zigzag stitch.
Pin and sew the crotch, right sides together. I sewed a straight stitch and then went over the edge with a zigzag stitch.
It looks this way when finished.
You can use premade bias tape, or make your own. I decided to make my own. This is a really dandy little tool for making bias tape. You just put the strips through it and iron as you pull them out. They are $3-$4 and sold with quilting notions. Well worth the price! Scraps = awesome bias tape! I made bias tape for this particular romper because I was working with a knit and did not want to combine a knit with another fabric type.
See the magical process? (And don't judge my dirty ironing board cover.)
Next up is hemming. You should hem the top neckline. I am showing a little hemming cheat here, but you can hem the normal way as well. Here, I just chose to zigzig stitch the raw edges, fold over once, and sew a straight stitch across. Just a little cheat. Not sayin' it's the right way. Not sayin' it's the best way, but I am willing to expose my cheats.
Here, the neckline and legs are hemmed.
Next up is adding the bias tape. I cut 2 strips of bias tape, approximately 18 inches long. I folded them in half and just pressed a little with my finger to make an indentation. I matched the middle of the tape with the seam in the middle of the armpit. I then pinned the bias tape to the arm, right sides together, and sewed there.
I then folded the bias tape over and pinned it down, all the way from end to end, folding in the edges of the tape. I sewed a straight stitch from end to end, backstitching at each edge.
Here is the romper at this point. Variation A would be to leave it as is.
Variation B is to add an elastic waistband. Using a wide single-fold bias tape, I pinned it across the wrong side of the waist of the romper and sewed it on.
I then folded the bias tape up and sewed a topstitch close to the top edge, leaving a small opening.
If you look closely, you can see that the top edge is not sewn shut.
Using a safety pin, insert the elastic into the bias tape casing.
Pull the elastic all the way around, pin it together, and then sew it together securely, using a zigzag stitch.
Sew the casing closed. Turn inside out, and try it on your model!
Other variations of the girls romper tutorial are coming soon, including a drawstring waistband, a shirred waist, elastic leg casings, and more!