General size: The plastic dome of our mop head is 6.3 inches in diameter (round). Fits most common mops (but not compatible with all disc mops, please read size information before purchasing!!!) Not compatible with Leifheit Clean Twist Disc Mop!!! This item has strong detergency, removes tough dirt, grime and grease without leaving water marks for a tidy home. Made of microfiber cloth , washable and reusable, it has strong water absorption, dries quickly and is durable. Package Contents: Contains 4 mop heads for easy cleaning and drying. Quick installation and simple operation. This replacement mop head is a great helper for floor, glass and car cleaning. Wide Usage: The microfiber broom heads are ideal for use in dry water. Suitable for cleaning, polishing and waxing smooth surfaces such as wooden floors, tiles, marbles, etc. Due to factors such as manual measurement and display differences, there may be have slight differences between individual products and pictures, please forgive me.