Hi, thank you for you question- These would be easy to cut to any size you would need.
These clear plastic discs go under plate glass on a furniture top.
As it has been said these do not have an adhesive, in order to answer we would need to know how these were adhered to your table surface.
Vinyl desk yes! Wood dresser, no.
I don't know that they would secure the glass plates to the shelf but they would eliminate them from slipping.
i used 6 of these under glass (16 x 46") on a wood desk - and they worked great.
I placed them directly on the top of an heirloom cherry desk and have not noticed any damage to the wood finish. I would,however, keep them from the effects of direct sunlight.