Update: The price has now risen to $9.26 on the medium size set.
Artisan Baking Sheet Non- Stick Baking Mat Set – Medium – Link 
Amazon has this marked down right now to a record low of just $6.62! This normally sells for over $20!
Alternatively, you can pick up the Artisan Baking Sheet Non- Stick Baking Mat Set – Large for just $7.96!
This is highly rated with a 4.7 star rating from over 3,500 reviews.
- Safe – Silicone Mat is Constructed of FDA and LFGB-approved materials. BPA and BPP free. Easy to clean, just wash with soap and water
- Versatile – Silicone mat can be used in the oven, microwave, toaster oven and freezer. Turns any baking sheet into a non-stick surface
- Saves Money – With a Silicone Mat there is no need for parchment or wax paper. Silicone is durable and long lasting
- Made in the USA – Half size baking sheet is commercial grade aluminum bakeware
- Quality – Aluminum baking sheet construction distributes heat quickly and evenly for consistent results. Reinforced with a galvanized non-rusting rod which prevents warping.