16" vs 18" vs Euro vs Gastronorm: choosing tray formats for your ovens and racks Posted by Mackies Bakeware on July 04, 2026 16" (406 mm), 18" (457 mm), Euro 400×600 or Gastronorm? How Australian bakeries choose tray formats to match their ovens and racks. Read more Tags: baking trays guide tray formats