Personalized Custom Name Street Sign - 6" x 18" Authentic Reflective Aluminum Personalized Custom Name Street Sign - 6" x 18" Authentic Reflective Aluminum. Personalized Custom Name Street Sign has honeycomb aluminum causing it to be reflective and authentic. Street Sign is made of reflective engineer grade prismatic reflective aluminum. High quality, will not fade. Thickness of street sign aluminum is .080 gauge. Dimensions of street sign are 6" x 18". Corners are rounded and each end has a hole drilled for hanging/drilling purposes.