This is a great chair mat. It came rolled up but flattened out very quickly. I have medium deep carpeting in my home office and it works great with that pile. I purchased this size as I wanted enough room for my chair to move around and it satisfies that need very well. It is just too wide for my desk! LOL But that's OK it spans the front of my desk and the lip provides me with a place to rest my feet. I recommend this mat just measure the width of your desk first! :-)
My mistake as this product is not any good for my carpet. The vinyl is to thin and therefore is creating "pockets" or holes where the rollers of the chair are. I am sinking into the vinyl which makes movement difficult. This product should be used only on a hard surface or an industrial carpet.