These cylindrical wall-mounting vases are made out of extruded tube glass so the diameter of each piece will always be the exact same. Use them for florals, floating tealights in, hang them in 3 or in multiples of three's to create living wall art. They love using them for extra-long stems, or for cutting the flower short so that it sits inside the glass to showcase the bloom as a work of art. There is small, beveled-edge hole on the back so all you need to do is grab a screw or a nail and a blank spot of wall. The bottoms are flat so you can also sit them on the table.