These are small fragments fired in a household microwave. Some are less than 1mm. Approximately 17.5g This is handmade by an amateur, so please understand this before purchasing. I am also selling on other sites, so if the item sells elsewhere, I will delete the listing even if I have received a comment. Thank you for your understanding. I may not be able to respond to comments until late at night due to work. Thank you for your understanding. *We have dogs and cats in our home. Even with precautions, pet hair may adhere to the item. Thank you for your understanding.