These brand new aluminum stitch markers come in 5 random colors and 5 size: XS - approx. 65mm: S - approx. 90mm; M - approx. 120mm; L - approx. 150mm; and, XL - approx. 200mm. They are durable, practical and convenient to use. They're perfect for both knitting and crochet. They work great on scarves or Icelandic sweaters and are particularly useful when making a garment that require 3 needle cast offs.