Adjustable will fit most sizes. 
Avoid wearing in water. Fashion jewellery only. 
Malachite absorbs negative energies and pollutants, picking them up from the atmosphere and from the body. Guards against radiation and clears electromagnetic pollution. Malachite clears and activates the chakras and attunes to spiritual guidance. It opens the heart to unconditional love.
Zodiac- Capricorn, Scorpio 
Chakra- Heart