Strap: Step 1 - Seaming
If you are starting with one long, continuous piece for your strap, skip to step 2. Otherwise, continue reading.
To join your two strap pieces into one long length, you'll want to use a reinforced seam such as a flat felled seam or a french seam. Jan from Sleeping Baby Productions has an
excellent video here on Youtube for these, but I'll show you a visual here as well. For a flat felled seam especially, you'll want to start with the cut edges as straight as possible. The best way to do this with a woven fabric is to
remove a weft thread and then cut along the line it left.
Typically when using a flat felled seam, you would start with the right sides together, but it doesn't much matter in this case since the seam will be encased inside the blanket.
Start with the edges you are going to join together parallel, but offset from each other by about 1/4". Stitch a straight line of stitches approximately 1/2" from the top fabric's edge (3/4" from the bottom layer's edge). Fold the overhang from the bottom layer over the end of the top layer and iron it down flat. Then spread the wrap out flat and fold the flap over the opposite way so the raw, folded over edge is hidden. Iron that down flat. Then run another straight line of stitches right along the fold to stitch the "flap" down.
Strap: Step 2 - Hemming
Once you have on long, continuous length of fabric, you simply need to hem all four edges. You can be thorough by folding each edge over about 1/4", iron, and then fold that over another 1/2", iron, and then pin before sewing the fold down with a straight stitch. However, if you are comfortable with your sewing machine, you can just
fold it by hand as you go. You could also use a hemming foot if you have one and are familiar with it.
The short edges at the end of the strap can be hemmed normally, tapered and hemmed, serged, or even
fringed, all based on personal taste. If you fringe the ends, either tie the fringe into a series of knots or run a line of stitching along the fabric above the fringe to keep any more of the fabric from unraveling.
Strap: Step 3 - Pleating
Time to pleat your strap! You'll want to pleat whatever will be inside the blanket. Since my blanket is about 20" wide, I pleated about 22" of my strap right in the center, which meant marking my strap at the center with chalk or a fabric pencil and then 11" from the center on either side. Then measure along the width of your strap and mark the center in this direction. Mark each half in thirds. Repeat this along the midline, and then again along your lines 11" from the center on either side. My strap was just over 12" wide, so my marks were all about 2" apart.
Then, to pleat, I brought the top-most mark and folded it down to meet the center mark, then ironed it down. I then brought the bottom-most mark up to the center and ironed that in place. I repeated with the marks 11" to each side, so that the entire 22" was pleated.
Strap: Step 4 - Padding
Padding your strap is completely optional. I decided to add 3 layers of fleece I had leftover from another project. I folded a single layer over 3 times to equal the width of my pleated strap (so about 12" of fleece folded in thirds to be 4" high) and then cut the length to just a bit narrower than my blanket (19".) If I were making a traditional
podaegi with a wide blanket, I would probably only pad the 15"-20" right in the center, personally. The padding is for baby's benefit; I personally thing that padding along the straps over your shoulders would simply keep the straps from spreading well and be cumbersome.
I then simply put it inside the pleats, and then pinned it into place. At this point, I took it to the sewing machine and ran a few vertical lines of stay stitching in the center and along each edge just to keep my pleats and padding in place.