Sandbox Cover, Transparent PVC Waterproof Outdoor Sand Box Cover for Kids, Protect Sandbox Sand and Toys (Transparent, 60" Lx60 Wx 8" H)

But it fit the sandbox. Duct tape works wonders

I ended up using this cover as a liner, fastening it to the wood frame with staples. Works great.

This clear sandbox cover fits perfectly over our 5 ft X 5 ft sandbox. The clear plastic has a string that tightens around the sand box to hold it secure. I also put a few bricks on top to hold it in place when it's very windy. One negative is the plastic has a strong smell that doesn't seem to be going away very quickly. This cover is an easy way to keep our sandbox dry and to stop stray cats using it as a litter box.

I used this as a way to germinate seeds in my basement on some cheaper material planters.Deducting a star for the smell. It’s very potent, like a swimming pool type smell. I’m sure outside it wouldn’t be a problem but inside it’s a bit obnoxious.