These are flat backed, dome topped mosaic glass border tiles used to edge your mosaic projects. They protect the edges of your projects so the tiles inside the border won't get knocked or chipped off. You can also use them to define areas, create a dimensional designs (such as flower stems), Please see samples. Mosaic border tiles are hand-cut so will vary from approximately 1/2" to 3/4" long by about 1/4" or larger wide. Some colors are slightly wider than others. They have a domed height of about 1/4". These make creat transition pieces for going from a high to low spot in your project. Such as stained glass height to china, vitreous or ceramic tiles. Please click pics to enlarge.