I’ve had a number of people ask for the details on how I made the kangaroo pocket on my recent Fen mods: tunic and dress variations. Following is how I do it — and since I’m not a sewing professional, there may be people with even better advice in the comments on this. You can of course adjust the numbers to your liking, but my measurements result in a generously sized pocket 14″ wide and 8″ tall. You’ll want to make and attach the pocket to your garment front piece before sewing the rest of the garment together.
MAKE THE PATTERN PIECE
Using tracing paper or butcher paper or whatever you’ve got, draw a rectangle 15″ wide by 9″ tall.
On the right edge, measure 3.5″ up from the bottom right corner and make a mark. On the top edge, measure in 3.25″ from the upper right corner and make a mark. Draw a line between those two marks for your slant pocket edge. Repeat on the left side. Cut that out and you have your pattern piece, with .5″ seam allowance included.
CUT AND PREPARE THE POCKET
Matching the grainline for your garment front piece, cut your pocket piece(s) out of your fabric. If you’re using lightweight fabric, like my linen, you may want to cut two identical pocket pieces and make it a double thickness. For sweatshirt knits or heavier woven fabrics, a single layer will suffice. Either way, you can zigzag or pink the edges if you like.
For a single layer pocket, press all of the edges under at .5″, then for the slant pocket edges (which will remain unattached), press the raw edge under another .25″; top-stitch along the slant edges, starting and stopping just shy of the corners.
For a double layer pocket, with right sides together and using a .5″ seam allowance, stitch the two pieces together along all but the long bottom edge. Clip the corners, turn the pocket right side out, and form and press carefully into shape. Fold the bottom edges inward and press; pin together if needed. Top-stich along the slant edges, starting and stopping just shy of the corners.
ATTACH THE POCKET
Mark the center of both your garment front piece and your pocket — I just fold them each in half and press at the appropriate spot, then line up the creases to center the pocket on the garment. Pin the pocket in place, being careful to keep the bottom and top edges parallel to your hem (i.e., perpendicular to the grainline).
First, stitch across the top of the pocket, starting and stopping at the rows of stitching you’ve done across the slant edges. Then starting at the lower slant corner on one side, sew down the side, along the bottom, and back up the other side.
Give it a good press, and carry on assembling the rest of your garment!
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