Sterling silver 0.925 head pins and eye pins are available in various sizes. Normally used sizes of sterling silver headpins and sterling silver 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.