(Evermark Marking) Most states require that one or more specific “Warning” signs be posted at all equine events. These signs meet all requirements for size and visibility for every state requiring posted signs. Please check your state law (Valley Vet is not rendering legal advice or service to our customers; if legal advice is required, we recommend that a legal professional be sought). 24” x 18”. Regulation sized. Beware of imitation, non-regulation sized signs.