These are stitch markers for use in knitting with knitting needles. Set of 8. Convenient for pattern knitting, etc. The second photo shows them on a size 5 needle (3.6mm), and the third photo shows them on a size 15 needle (6.6mm). Please use these for size reference. These are handmade items by an amateur. Not recommended for those who are overly concerned about details. *Notes* I have a cat. I pay close attention to odors and hair, but please refrain from purchasing if you are sensitive or have allergies. Stitch markers, knitting markers, knitting, stitch markers