These signs are great! We have two labs that run around freely, due to the invisible fence, but the pup is a barker so I think the signs will help so walkers, bikers, etc...aren't afraid to come by our house. I would definitely recommend these signs to others.
I didnt pay attention to the 18" height when ordering so initial thoughts is that it is big for a yard sign, but I like the height upon further reflection because I can put it closer to the middle of my yard and keep if away from the walkway! Nice sign!!!