These are individual 3.5in x 2.9in single use portable coffee filter with hanging handles that hang on the rim of the cup or mug. Usage: Office, Traveling, home and fits to all coffee mugs. What is in the box 100pcs Disposable Coffee Filters. How to use: Open up the flaps from each side of the filter bag and place it in your cup. Simply grind your favorite coffee beans of your choice, pour the measured coffee grind into your dripper and add boiling water and let it sit for about 30 seconds. Or slowly pouring boiled water through the filter bag like a pour over. Dispose of the filters bag and enjoy your coffee. Additional Details ------------------------------ Product description: These are individual 3.5in x 2.9in single use portable coffee filter with hanging handles that hang on the rim of the cup or mug. Usage: Office, Traveling, home and fits to all coffee mugs. What is in the box 100pcs Disposable Coffee Filters. How to use: Open up the flaps from each side of the filter bag and place it in your cup. Simply grind your favorite coffee beans of your choice, pour the measured coffee grind into your dripper and add boiling water and let it sit for about 30 seconds. Or slowly pouring boiled water through the filter bag like a pour over. Dispose of the filters bag and enjoy your coffee.