I spend a decent amount of time at my desk, so it's important for me to have a good chair mat to keep my chair from destroying the rug and floor where my desk is located. This Regency Gripper Office Chair Mat made for hardwood floors with a lip is a great choice. Coming in at 36"x48" with a 2.2mm thick heavy duty plastic mat..

It comes in a box rolled up. The instructions to flatten it are pretty clear and very easy to follow to ensure that the mat will flatten properly and not crack later. After about 24h the mat was ready to use, and very easy to place. I found it doesn't move at all. I actually have it on carpet, not hardwood, and it is just perfect. I did place it on a hard floor surface and it stayed out really well there as well. 

My chair glides very nicely on the mat and so far there are no issues. It's a great mat, perfect for any office, or floor area that you need to protect.