Sewing your own baby sleeping bag is a creative process that allows you the flexibility to tailor the design according to your needs. Using the same sewing pattern, the sizes and fabrics can be switched up to make a thoughtful baby shower gift or customised to accommodate your own growing baby. With basic sewing skills, it is moderately simple to make a baby sleeping bag.
Pre-wash your selected fabric to prevent shrinkage after sewing. Iron the fabric and place it on a flat surface area so that the corners are matched and facing in. Using sharp fabric scissors, cut the fabric into a large rectangle measuring 87.5 by 112.5 cm (35 by 45 inches). You can use a fabric pencil to mark this measurement so you don't lose its place during the cutting process. This measurement can be adjusted depending on the size of the baby. Repeat this process once more until you have two pieces of rectangular fabric.
Pin both pieces of fabric together along the edges. Make sure the corners are in line with each other. Using a sewing machine, sew the edges shut but leave a 5 to 7.5 cm (2 to 3 inch) opening. This will allow you to turn the fabric out exposing the right side.
Cut any excess fabric along the seams and inverse the fabric through the 5 to 7.5 cm (2 to 3 inch) gap. Iron the edges to smooth it out. Using a needle and thread, stitch the opening shut.
Fold the sleeping bag in half and measure along the bottom and right edges to determine the proper zip size. A zip can be bought from your local craft shop. If you prefer the sleeping bag to not zip all the way up along the right side, you can opt for a shorter length.
Flip the sleeping bag so the inside faces out. With the zip shut, pin it along the bottom and open side of the sleeping bag. Once you have pinned the zip to the bag, you can then unzip it to make the sewing process simpler. Sew along the edges of the zip and back stitch at the ends to secure the stitch and prevent it from unravelling. Reverse the sleeping bag and press with an iron to smooth out any wrinkled surface areas or edges.
Choose a heavier fabric if you live in an especially cold climate. You can buy two separate pieces of fabric to distinguish the interior lining from the exterior.