Tulip Needle Company-Stitch Markers: Small, Medium, Large. These markers are elastic, hard to slip off, and yet easy to pick up. This 4x2-1/2x3/4 inch package contains five small stitch markers, five medium stitch markers and five large stitch markers within one storage case. Yellow/Red/White
Small: Fits needle sizes up to US #2.5 (3.00mm)
Medium: Fits needle sizes up to US #7 (4.50mm)
Large: Fits needle sizes up to US #10 (6.00mm)