Adjustable will fit most sizes. 
Avoid wearing in water. Fashion jewellery only. 
Larimar is said to enlighten and heal in a physical, emotional, mental and spiritual way. It stimulates the heart, throat, third eye and crown chakras facilitating inner wisdom and outer manifestation. It represents peace and clarity, radiating healing and love energy.
Zodiac- Leo, Pisces 
Chakra - Throat