Thanks. However I wonder just how small a perforated object has to be before its not considered a bead. I've come across tiny Neolithic beads from Irish sites, some with a diameter of 4mm and others with a perforation of 1mm or less. These have been found in association with bone beads, stone pendants and bone tubular spacers etc - but does their size mean they are not really beads? If so what should they be called? I have also recorded some fairly large tubular stone beads (unprovenanced) - and can't imagine how they could have been strung or worn comfortably.