This kind of patch pocket is most common used in bags. The roomy part was design to carry mobile phones – well, the phones changed over past couple of years, so such small pocket isn’t enough in most cases any more, but you can always adjust it to your needs 🙂
To make this pocket you need a rectangle, which height equals 2x the expected pocket height, and width equals the width of both pockets + 2-3 cm / 1 inch (for pleat). Of course, you need to add seam allowances around the rectangle. 1. Fold the pocket piece in half – right side of fabric should be inside. Sew as shown in the picture, leave an opening on one side. Make turns with the needle in the down position and with the presser foot raised.
Your pocket is done 🙂