The prettiest thing I’ve ever seen Was a floating flashing rose in a stinky latrine Pretty you ask, how could that be? A rose amongnst thornes, it’s plain to see Dimensions: Diameter: 2.50 in. , 6.35 cm. LED Colors: Rainbow Floating Deco Roses with Color Change LEDs include 2 replaceable CR2032 Batteries. To change batteries, start by removing the battery pack from the bottom of rose. Use a small screw driver to remove the top of the battery pack, then simply replace batteries.