I had some leftover fabric after I completed my tsumami-zaiku courses, and decided to make this piece from some of that leftover fabric. I never like material to go to waste, and try to make use if it if I can. 
This is what it looks like from the back - and you can see how long the pin is too.
I usually attach the flowers to the pin with cellophane tape (scotch tape) and then use a little glue to adhere the start of the thread before winding it around the pin and flower wires.
Here’s a video of the finishing process for this piece if you’re interested in seeing how it’s done.