LAMPSHADE SIZE - Our table lamp shade 12-inch (30cm) diameter top, 12-inch (30cm) bottom diameter, 8-inch (20cm) high; 1.65 inch (42mm) ring diameter. Medium size fits most table lamps, pendant lights, and floor lamps. (NOTE: The diameter of the mounting hole is 42mm, NOT suitable for standard harps).Using Configuration 1: SPIDER MODE - Easy to use (The diameter of internal thread is 0.39 inch), but before buying, please make sure your fixture is Spider and has Harp, otherwise you need to buy Harp to use this shade.Using Configuration 2: FIT FOR E27/E26/E14 LAMP HOLDER - The fabric lampshade is suitable for E27 lamp sockets (The diameter of the lamp socket ring is 1.65 inch). We also provide E27 to E26 and E27 to E14 lamp adapters to meet your needs for different lamp holder specifications. (NOTE: Please check the ring diameter of the light frame carefully before ordering.)DURABLE MATERIAL & SIMPLE ASSEMBLY- The floor lamp shade is made of linen fabri