This is a new White Color Light Trim Ring. It is designed for a 6 inch recessed trim ring ceiling light fixture. The measurements of this recessed can lighting fixture ring are: Outside Diameter: Approximately 7 1/8" Inches or 18 Centimeters Inside Diameter: Approximately 5 7/8" Inches or 15 Centimeters. Not UL listed White Finish Designed for a 6 inch recessed trim ring ceiling light fixture. Outside Diameter: Approximately 7 1/8" Inches or 18 Centimeters Inside Diameter: Approximately 5 7/8" Inches or 15 Centimeters. Not UL listed