I know the concept isn't original. Perhaps the design though, is.
In most of the tutorials I looked up, the recommended construction technique was to unpick the back side of the tie, remove the inner core, stitch it together either in the creases or on the raw edges, and if you stitched it in the creases, re-hand-stitch (see how I hyphenated it to make it my own word) the back side of the tie. Sounded like a lot of work.
One site suggested sewing together the edges as you would any other seams with the fronts of the ties together and then pressing the seams.
I instead used a vine stitch from my mom's sewing machine (mine doesn't have anything so fancy, and slightly overlapped the ties.
The result was as I imagined, except at the top. Since ties are cut on the bias (this is where hind-sight comes into play) the top of the skirt was skewed.. I thought about wearing it anyway, but it was too much.
So I found a pair of jeans that weren't exactly the latest trend and cut them off just below the pockets. I like the flower embroidery below the pocket. Note: If you choose to follow this technique, make sure to leave the pocket lining (the white part) intact or you'll end up with really short pockets that don't hold much.
If you buy all the ties, it is quite expensive. Even if you purchase them second hand, at $2.00 a tie it adds up quickly. I think this one had 30 something ties in it. Talk to all of your tie-wearing friends. It is likely that one or many of them will have a few hanging out in the closet that they no longer wear. You could try to match colors, patterns, widths, or you could have a completely random selection. This may look random, but actually each tie has a color in it that matches the tie next to it (you'd have to look closely on some of them).
I like the uniqueness of it, the length, and best of all, many of the ties belonged to my dad. Other than the fact that it should probably be dry-cleaned, I love it.