Heart Shell Buttons 10mm Green Pack of 20 Green Heart Shell Buttons £1.40 Quantity: at £1.40 each Add To Basket 2 in stock. Green Heart Shell Buttons Size approx 10mm - 10.5mm in diameter and 2mm thick - 10.5mm is approx 3/8th of an inchPack contains 20 buttons. Made from freshwater shell. How very cute are these? Small and diainty, these buttons would also suit jewelry projects.As shell is a natural product there may be some natural ridges, markings and colour distortions in the buttons but these do not detract from the quality of the buttons, they add to their character.Please note - by the very nature of these buttons being shaped from natural shell, they are not all perfectly flat or identical.