Mosaic house number with a Blue titMosaic house number with a Blue tit These mosaic numbers are perfect to hang on the outside of your home. The glass tiles are all light and frost resistant so shouldnt degrade or fade. The base is a slate tile and from my local reclamation yard. All the slate is cut by hand which means if you need a specific size other than the stated sizes then just send me a message. There are four holes in each corner so you can easily attach it to your wall. If