DIY Pouch Baby Sling Tutorial ~ This baby pouch is not adjustable like a ring sling, but instead is fitted for the wearer. The original post also provides a link where you can get measuring instructions and the sewing pattern.
I used the sling that Joan (a family friend) made for me almost every single day for a good six months straight (probably would have started using it sooner but I forgot about it until july). It was an instant baby soother and was very good on my back. HIGHLY recommend a sling!