4 1/2 to 5 metres of stretchy T-shirt material 150 cm wide. I chose the thickest kind which is quite hot in summer, and 5 metres is probably too big for a small person but I wanted a big one in case my husband needed to use it. This material doesn't fray so all you have to do is cut it in half or even thirds lengthwise and maybe sew on something in the middle to help you find the middle and there you have 2 or 3 new baby wraps. I kept one and gave the other one to my sister in law.
Because my wrap is so hot I recently bought some muslin type material, which isn't as stretchy and will need to be sewn as it frays. I haven't had a chance to complete this but i'll let you know how it goes.
www.thebabywearer.com is a great place for wrapping instructions and youtube has many tutorials.