Woot offers SkySolutions Anti Fatigue Floor Mat 2 PK (20" x 32", Black) for $20.99 (orig. $45). Free shipping for Prime Members.

Product Description:
All Day Support: For anyone who spends a lot of time on their feet at work or at home, this anti fatigue mat is a game changer. Built with a soft foam core, our kitchen rug helps reduce stress on your knees, muscles, and joints. Place them in front of your kitchen appliances, as a kitchen sink mat or use it as standing mat for standing desk.

• The size is (20” x 32”)
• 2-Pack
• Quality that feels like Clouds: Our 3/4" thick density kitchen mats for floor are made with premium materials that will support your feet, ankles, knees and legs during extended periods of usage while always feeling like you are walking on clouds. Perfect companion for extended stand up desk sessions or long kitchen meal prep. Our 20x32 model makes a great match to place in front of the kitchen sink.
• Padded mat Improves Balance & Posture: Ergonomically designed, the cushioned kitchen mat for floor help relieve spinal pressure and reduce lower back pain while increasing blood flow to keep you standing alert and strong.
• Commercial Grade: Complete with a non-slip bottom and an anti-curl edge, these standing anti slip mats are the same kind used by businesses and restaurants to absorb shock and avoid tripping in high foot traffic areas making them an excellent home office choice. You can also use them as a garage floor mat for those extended working periods!
• Stylish & Easy to Clean: The sleek anti fatigue floor mat comes in a variety of colors that will complement any space making it an excellent kitchen decor. The mat does not absorb liquids or other substances therefore it serves as protector for your kitchen floor and makes it easier to clean!