Sidewalk Signs: This would include folding sidewalk signs, Swinger signs, Tip 'n roll signs, Springer signs, A-frame signs, or any other sidewalk sign that has a pretty narrow base.
- A-Frame Style signs: Many of the A-frame signs have a chain that connects the two sides of the sign. When the sign is fully opened, this becomes an ideal spot to put a sandbag or possibly a cinder block.
- Hollow signs: Not all of the signs meet this description, but my folding sidewalk style sign does. It can be filled to keep it from leaving the ground at the first gust of wind. And, many of the Plasticade style signs also have the ability to be filled with either sand or water.
- Swinger signs: Because the Swinger sign has a crossbar on both the front and back, the Swinger sing is the only sign that would allow sandbags to be put on both the front and back of the sign. Also, (I haven't tried this) tent pegs should also work on the Swinger sign. Pound the tent peg into the ground, and make sure the "hook" is secured over the crossbar.
- Big Black Signs: The large black signs are a hurricane proof product. They have screw on letters, and this product should hold up well for you in the wind.
- Arrow Portable Signs: Having had a bad experience with a trampoline in the past, I can say with confidence an auger style earth anchor would be a GREAT tool in holding down a sign. The website I found these on also offers retaining straps, but I am sure properly used bungy cords would also be very effective.
- I sell a wind/vandal cover for the signs. This would help with letters being blown off, but it does not give the sign much additional weight. Other vandal covers are on piano hinges mounted to the sign. Depending what these are made of, they will also provide some weight for the sign.