Amanaote Gun Black Safety Pins 37mm X 10 mm Size Jewelry For Kilts Blankets Skirts Crafts Pack of 30 Saftey pin size:37mm X 10 mm(L X W). 1 inch=25.4 mm. material:metal. Strong enough for use with heavyweight material like wool, leather, canvas, vinyl & upholstery Findings for jewelry making, craft making. Ideal for Blankets, Skirts, Kilts, Crafts