Those are our loaf pans made by USA Pans, Pam. And they're fantastic! They are slightly corrugated to allow air circulation during baking, which promotes even heat distribution and a perfectly baked loaf! They're available in both the standard 8 1/2" by 4 1/2" size as well as the 9" by 5" pan. Happy baking! Kye@KAF

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