Here is my first ever sling. It is made from a braided poly cord I got cheap at the hardware store and a simple 6-hole pouch more or less made to curious-aardvark's plans. It is 29" long, hung loaded and ready to sling it hangs about an inch or so above the ground. I have at this time maybe 3-4 hours practice total but the power these simple little weapons can generate is impressive. I find that stones of perhaps 3 oz. seem to work well for me with this sling.

A good pouch!

Is decent looking sling - I buggered the link up trying to get it to display in the post.
Sorry

note to self : before messing with links - save a copy of the original first !

Good looking sling... much better than my first efforts.

Your first sling looks orders of magnitude better than mine! My first one was a set of cut-up shoelaces and a rectangle of fabric from some old curtains that used to hang in my room. The material was so floppy, the tennis ball I was using for ammo wouldn't stay in and I nearly threw the whole idea of the sling away as a POS weapon! Thankfully, I stuck with it and realised what I was doing wrong, but it looks like you're steps ahead of where I was with my first attempt! Nice job!