28 X 20 Inches Aluminum (Dry Erase - This Plant Has Worked ___ (Dry Erase Marker Insert) Days Without A Lost Time Accident ----- The Best Previous Record Was ___ (Dry Erase Marker Insert) Days Do Your Part Help Make A New Record Lost Time Accident signs are made of aluminum, 28"x20" (Inches) and have a dry erase area for dry markers or magnetic area for magnetic numerals. Don't see it - We can make it. We will customize lost time accident signs for you. Fill out a simple online form by clicking here.. Alternatively, you can call toll-free 1-866-753-6257 or email customerservice@tuffrhino.com  for a custom quote.