Silver plated head pins and eye pins are available in various sizes. Silver plated headpin eyepin are made of copper metal with high quality plating, thus you may call these a copper headpin and copper eyepin as well. Normally used sizes of headpins and eyepins by jewelers are 0.5 inch, 1.0 inch, 1.5 inches, 2.0 inches, 2.5 inches, 3.0 inches, 3.5 inches, 4.0 inches. So pick the one from following categories suitable for your jewelry.