Approximately 18x11mm clear glass bottle charms in the shape of jars. 6.5mm neck opening. Lightweight. Includes a real cork (plain or with loop). Most corks fit snugly, but a few won't. Perfect to bead over with seed beads or fill with glitter, tiny glass beads, crystals, or sand from a beach vacation. Tie a cord onto it and hang around your neck to hold medicine, prayers/affirmations, a lock of hair, etc.