When the oysters are first brought in, they’re tiny. Most are about a millimetre which similar to grains of sand. Tney’re grown from about a millimetre to about 8 mm and need to be treated with a lot of care. However, most of that growth happens inside. It’s only when they’re about 3 mm that they are out into the swell. That’s when they start growing to the size that we are more accustomed to see.