Don't Touch Hose Spigot Sign

I have a garden hose spigot that I have a two-way split on it to control two separate hoses. The two-way has on/off knobs on them and that is where people should turn the water on and off, but some people don't. 

To fix this, I made a sign that slips over the spigot main shutoff but doesn't block the other two knobs that people should use. 

This model will scale nicely in the slicer if it doesn't fit your water spigot. Mine is a little tight on purpose, so it doesn't slip off in heavy wind or gets accidentally nudged. 

I suggest printing in PETG since it will be outside and exposed to water.