Dimensions: the outside diameter measures about 6 cm, inside diameter is approx. 2.9 cm and height is approx. 0.5 cm Features: the white metal lamp shade reducing ring can help the unsuitable lamp shades Wide application: converts European and Continental lamp shades to British lamp holder size, and this lamp shade reducing ring can work for round head bulbs of various types, helping to fit different lamp holder sizes Warm notes: the lampshade is larger, it is not suitable for resting the smaller light bulb; Install the reducer ring can help you use a small bulb Durable to use: the lamp ring is made of durable quality metal, fits on lampshade better than plastic ones, durable to use and last for a long time Product Description Note: Please pay attention to measuring the size of your bulbs' round head and select the right type of reducer ring. Metal Lamp Shade Reducer Ring It can fix the lamp cover well,in addition, it helps to use small bulbs for inappropriate lampshades to reduce waste. Made of durable quality metal, fits on lampshade better than plastic ones, durable to use and last for a long time Serviceable material Convenient to install Enough quantity Read more