I decided last night to try to duplicate it. If you're concerned about copyright infringement, keep in mind that I do not claim the design as my own, I'm not publishing my stitch count, and I'm not selling anything in relation to this experiment.
I was able to get a close stitch count from the Etsy photo but it still didn't tell me how to tat it, so I drew out the shape and tried to find a logical direction to tat in and a starting point. Then I sat down and tatted according to what I'd figured. Right off the bat something was wonky. I went ahead and finished the first sample and then compared it to the original. At that point, I could see I'd started off in the wrong place. Close, but it made a significant difference in the final look.
This morning I started tatting at a different point and it went much smoother. I also noted my clover at the bottom seemed a bit bunched so I changed the stitch count slightly as I proceeded to the next repeat and it lays better but I'm not sure it's looking the way I want. I'll probably tat a few more samples with minor changes to get it the way I want. I missed a join too and that makes a difference in how it lays.
For this sample, I wound approximately 3 yards on my shuttle and this is as far as I got before I ran out of thread. That means this edging is thread intensive. I used size 20 Manuela and that doesn't include the thread from the ball for chains. So maybe 5 yards total for just this much tatting? A finer thread would take less, of course, and you would work up a sample and check accordingly. This is important if you're using hand dyed thread because it comes in 50 yard skeins. In size 20, I'd only get 10-15 repeats of this motif which probably would not be enough for a mat so I'd need to order more than one skein. In size 80, it would probably be enough for a hanky edging but I'd check it out first!
Okay, the purpose of this exercise is NOT to show you how to copy someone else's pattern. The purpose is to show you one way to design something yourself by using a process similar to what I did with the edging. If you're clever enough to figure out an existing design, you're clever enough to design your own patterns.
I googled images with the search word "scroll shapes". One of the hits was this freebie page, Free Vector.com and here's one I picked to save in my "Inspiration" folder.
I'll probably use this more for embroidery but I'm posting it here because the lines are simple and a good example to start out with.
Here are some ideas to think about. The center of each of these is a line. Some are straight and some are curved. Chains are the most common way to depict a line, both straight and curved. How many ways can you tat a chain? The usual way with straight tatting, lockstitch chain, purl chain, rings thrown off chains - those are the first that come to my mind. The shape of your line will determine which technique you'll use.
Now see all the things outside of the lines? What kind of tatting comes to mind? Rings, beads, block tatting? So you start building your design. Are you going to tat it in one go or are you going to do sections? What order makes the most sense? As you put it together, other ideas will come to you and you may end up with something ENTIRELY DIFFERENT! It happens all the time.
Give it a try, play, and feel free to email me your results!