Plastic debris can come in all shapes and sizes, but those that are less than 5 millimetres long (or about the size of a sesame seed) are called “microplastics”.
[noun]
Tiny pieces of plastic particles smaller than 5 millimetres in diameter, deriving from a variety of sources including larger plastic pieces that have broken apart, resin pellets used for plastic manufacturing, or in the form of microbeads used in beauty products.
e.g. Plastic debris can come in all shapes and sizes, but those that are less than 5 millimetres long (or about the size of a sesame seed) are called “microplastics”.
