Sesame Plant : 30 Healthy One Pot Vegetarian Meals - iFOODreal.com - Dec 28, 2015 · plastic debris can come in all shapes and sizes, but those that are less than five millimeters in length (or about the size of a sesame seed) are called “microplastics.” microbeads are tiny pieces of polyethylene plastic added to health and beauty products, such as some cleansers and toothpastes.