Take needle and thread back down through the last size 15 seed bead strung and pull snug so that the two beads line up next to each other. (You also want to be careful that the line of seed beads doesn’t pull too far away from the pearl.)
Take needle and thread back up through the size 11 seed bead so that you are in position to string the next size 11. Pick up another size 11 seed bead. Take needle and thread back down through the next size 15 seed bead strung. Pull snugly and take needle and thread back up through the size 11 bead just strung.
Continue in this manner, working
square stitch, until you have stitched 1 size 11 seed bead to each size 11 seed bead in the row. The work will start to curl all by itself as you work.