Protect and Grip Thimbles offer the perfect combination of soft, elastic material with the safety of a metal thimble cap. The scallop design offers breathability, keeping your finger cool. It's excellent elasticity helps the thimble form naturally to your fingertip for a light fit. Safe and smart, the ridged and dimpled metal cap holds the needle tip in place and pushes needles in safely. This new thimble provides comfort and lightness. DIAMETER SIZES: #6025: Small - 14.5mm (9/16") #6026: Medium - 15.5mm (5/8") #6027: Large - 17mm (21/32")