Delta Blinds Supply Spring-Loaded Replacement Pins - 20 Pack This 20 pack includes 20 individual pins Approximate pin dimensions - Stile Side: 15/64" diameter x 1/2" long. Retractable Pin: 9/64" diameter x 3/16" long Suggested hole dimension for pin installation - Stile: 1/4" diameter. Louver: 5/32" diameter