HIGH QUALITY GLASS Manufactured from high quality, robust 2mm thick glass. COWL 145 MEASUREMENTS Width at base 14.5cm dia., Height: 15cm, Maximum width: 17cm, Width at crown 10cm. ROBUST & PROTECTIVE PACKAGING - All of our glass oil lamp cowls are boxed in robust protective packaging. WORRY-FREE RETURNS - We offer a no-quibble 100% satisfaction money-back guarantee with all our products. PLEASE NOTE – Dimensions can vary by up to 3mm, due to the manufacturing process.