10 Metal Silver Skull Beads For 550 Paracord Bracelets, Lanyards, & Other Projects 10 Brand New Silver Alloy Skull For Paracord Projects Measurements: 12mm x 10mm x 8mm with an approximate hole size of 4mm. You can fit one strand of paracord through the 4mm hole. Have any questions, please send me a message. Your order will almost always be shipped the following day, with the exception of Sundays.