To make a practical, reusable frost cover for succulents in the landscape, I start out with plastic hardware cloth that is readily available at most Hardware stores. It's flexible, but still stiff.
Using scissors, cut the cloth so that it's about 2" taller than the plant. The length should be long enough to clear any part of the plant and overlap on itself by about 4".
Once you have the cloth overlapped, it's time to secure the "cage".
I use small lengths of poly twine to secure the cage. Make sure to weave in and out of both of the overlapped layers. For larger cages, a tie at top and bottom is recommended.
Once the cage has been secured, wiggle it a bit to make sure it is seated well at the base.
Cut a piece of frost cloth that is large enough to cover the cage and reach the ground with a few inches to spare. It is critical that there be no gaps!
Lay the cloth over the cage, and make sure that it is completely covered. Gather the cloth together at the base, and secure with clothespins. I usually use 3-4 clothespins for each cage.
If wind is a concern, I use rocks to add weight and security.
I've used this method for several years now in the SF Bay Area. The advantage with this system is that if the weather warms up and you remove the frost cloth, the cage is in place for the next frost.
To simplify set up and take down, I recommend labeling the covers and cages.This enables you to easily tell which plant they are sized for.