PRICES MAY VARY. Novel Design：Perfect Color, Shape and Size – The yellow diamond shape of 5.1”x5.1” signage follows the guidelines set out by the US Department of Transportation for warning signs. Best Safety Car Signs:Our baby on board sticker protects your baby during drives. The diamond shape cautious warning sign lets other drivers be aware, careful, and keep a distance away from your car. A safety necessity for road trips when driving with a baby. High Intensity Reflective Vinyl:Made of hig