Here's a revised description for your grey Saxony pile carpet:
"For sale is a high-quality grey Saxony pile carpet, measuring 7m x 4m (23 x 13 feet). This carpet was ordered separately and is a special piece. Similar carpets retail at £650, but you can purchase it here for just £295. Please note that this listing is for the carpet supply only."
This description highlights the carpet's size, type, quality, and the cost savings for potential buyers.