This is a popular sized glass fish bowl that is well suited for small wedding table arrangements, floral centre pieces, terrariums and can be used as a candle-holder. Top opening is 9.5cmD, widest measurement 15cmD, height 12cm. This fish bowl may be too small to be filled with water and used as a fish bowl. The holding volume of the bowl is 1.8L. Please note, as this is a handmade product, diameter of opening may vary.