Measure and cut out a cardboard template for your pocket patch. Don’t forget to include 1 in (2 1/2 cm) seam allowance and an extra 1 in (2 1/2 cm) for the top section to be folded over.
Cut the pocket out, using the template as a guide.
Turn the pocket wrong-side up, fold in the seam allowance then press with a hot iron, using the template to secure the fold.
Fold the top section down and press with a hot iron. Machine stitch a line across the top – this will be the opening to your pocket.
Lay the T-shirt flat on your work surface. Place the patch over the chest, preferably on the left bust, ensuring the stitched top-side is the right way up. Pin to secure.
Sew on your patch pocket using a straight stitching line close to the edge, removing the pins as you go. Don't sew the top section to the T-shirt.
This tutorial is excerpted with permission from <a href="http://amzn.to/1tfPUsH">"Adorn: 25 Stylish DIY Fashion"</a> by Kit Lee and published by Hardie Grant Books.