Here is a super simple way to mend a hole under the arm of your sweater or t-shirt.
Use a stretch needle and a stretch stitch or zig-zag stitch on your sewing machine. Or, simply sew by hand using an overcast stitch.
Here we go:
1. Pin the underarm seam
Turn the sweater inside out. Pin the underarm seam together, matching up the side seams for a neat finish.
(Yep, I forgot to match up my side seams, as you can see in the bottom photos.)
2. Sew a new seam
Start on top of the original seam a little before the hole, curve around the hole and end on top of the original seam a little beyond the hole.
3. That’s it, you’re done!
It only takes about three minutes, so don't do what I did and put it off for three months!