These low-cost diamond-shaped signs can more subtly mark locations and routes than larger signs, but are still quite visible from quite a distance. Standard portage symbol. Tough yellow UV plastic and black UV ink means this image will last outdoors. Each has 4 holes for mounting and measures about 10x16cm (~4x6inches). Popular with parks and canoe route managers, this also makes a nice gift for the avid camper or paddler.