This pad would probably work fine on 1/4" carpet with no padding but consider a heavier weight mat for any thicker or padded carpet. Chair wheels tend to dent the mat when used on thicker or padded carpet.
Not nearly as thick rugged and durable as the one I purchased from another vendor for the same price. I'm sure I'll have to replace this at some point in the future as a result.
[...]The mat slid on medium-pile carpet the first few days but haven't noticed any movement in the past week or so. Overall very satisfied with the product.