19 black background strings were needed to make this bracelet, I use embroidery thread. 15 of these strings were 40inches long and 4 were made longer. The longer strings I used to make macramé knots for the loop and tails of the buckle. A tutorial for the buckle can be found here: http://friendship-bracelets.net/tutorial.php?id=24. I used one full red skein and the start of a second skein and only a bit of white to complete this.
(More technical: I used 7 black strings that were 80inches long and folded them to make 14 strings at 40inches long, 1 black string I cut to 40inches and the macramé strings were two strings at about 90 inches long also folded into two to make 4 strings. Believe it or not that makes 19 background strings all-together.)
Halfway through making the bracelet one of my black background threads broke which was incredibly annoying! However I tied another black thread to the broken one and managed to get the joining knot to the back of the bracelet luckily it's not even noticeable.
The pattern for this can be found here:
This site has pretty much all the info you would ever need for these kind of bracelets and ridiculous amounts of patterns. I think my next will be 'Marvel' bracelet...when I get the motivation to start another one...