EZ-Mats are 14½" x
10" in size, and made from durable, non-toxic materials. 2 tabs at both ends can be inserted into the floor wire, securing the mat in one spot, hopefully well away from its 'bathroom' corner.
(Note that some rabbits with a particular penchant or need for chewing may pass time chewing on the EZ-mat. Damage will be exclusively to the mat; I have never heard of the EZ-Mat harming a rabbit.)