Squiggle Design The Squiggle Design may be specified in either of two surface options — an embossed orientation (tiles at right) for a more rustic, textured surface — or a debossed orientation, (tiles at left) for a smoother, more “glassy” finish. Standard UltraGlas Colors Glass Edge Thickness: 5/16” Download PDF File of Catalog Page. Also See: MultiDot/Metal/Grid Rain Ribbed Woodrift