This is pattern #20 in the book “75 Exquisite Trims in Thread Crochet.” Instructions on page 46. Featured on page 10 of the Trim Selector, and in the project on page 124.

Finished width: 1-1/4 inches (32mm)
Thread required: 2-3/4 yards per inch of trim (1 m per cm of trim)

All pattern samples in this book are made with size 10 thread and a size 7 (1.65mm) crochet hook.