How to Hem T-Shirts

Trim your t-shirt if you are hemming it for a shorter length. Choose a length between half an inch and an inch longer than you want it to be when it is finished.

Heat up your iron and turn your shirt inside out.

Fold the edge that you want to hem up just a bit -- about a quarter to a half of an inch -- and iron this fold in place. Work your way around the entire edge, folding and ironing your fold flat.

Repeat this process. Fold the same edge up again, about the same amount, and iron it again. This should give you a triple layer of fabric and no visible raw edge where your hem will be.

Go around the edge one more time pinning your folds in place approximately every few inches, particularly if the folds seem unlikely to stay in place by themselves.

Thread your needle with a long thread that matches your t-shirt, and knot the ends of the thread.

Hold the hem edge in your non-dominant hand and make a stitch using your dominant hand. Sew down right next to the folded layers and up at the edge of the folded layers. This should be a very small stitch.

Move forward and repeat this stitch about half an inch further along the hem. This leaves a relatively large stitch on the inside of the fabric (the side you are looking at now) but you won't see this when your t-shirt is finished.

Continue the same way, making stitches about twice for every inch until you get all the way around your hem and back to where you started.

Make several small stitches on top of one another to secure the end of your thread. Clip off the extra thread close to the fabric.