When I was working on my 1st bargello I also thought I needed to get some sort of pins to keeps the rows in order. Didn't care for the price I found for the flower head pins so made my own using alphabet beads with holes in them and my yellow headed straight pins. I slipped a bead onto each pin and let some Elmer's glue slip down into each hole and stuck them to the bottom of my ironing board to dry. I can make a dozen sets of A-Z from one bag of the beads and a box of my yellow headed pins. I've given a couple sets out to others. This way was much cheaper for me and if the bead comes off down the road, I just add a dab of Elmer's Glue and its fixed again.