I've been wanting to make this sling that I saw for my sister-in-law, so I did a practice run, which I may give away or keep for myself. ;o) The pattern if you want is free on-line from maya Wraps...They usually run around $60, but you can chek it out!
It took 2.5 yards for someone my height @ $2.99/yd and the O-rings were $.70 from Lowes!! Seriously, all it took was 2 straight stitches and I added a pocket for anything you might need. Oh ya, and don't mind the model in the last pic! Hahaha.