I have an amazing tutorial for an extremely easy sleeping bag for a baby.
I took as many pictures as possible to give full guidelines.
Let’s start with the type of fabric. Since the baby shouldn’t sleep with any additional blankets I picked a thin type of polar fleece, about 110 cm by 75 cm. After a couple of months my baby is about 56 cm long from the top of the head to the tip of its feet, so 75 cm is actually extra but I would like my sleeping bag to be good for the next season as well.
Fold the fabric in half along the short side and cut it. One side will be our front, the other one will be the back.
Cut the front in half again and then shape it on one side as on the picture. You can also make a more straight shape or a rectangle.
The next step is to place the zipper face down on the inside of the sleeping bag but you have to make sure that the 2 cm edge which you left earlier will be nicely folded so the machine will sew thru it as well.
You can remove the stitching on both fabrics along the zipper.
Also fold the top and the bottom ends hiding end of the zipper inside and sew around.