Question: are all ovens the same size?
Answer: Ovens start at 24 inches wide, the next size up being 27 inch, and the most common 30 inch. Ovens measuring 36 inches are also available but are a lot less common. The most common height for 27- and 30-inch Single wall ovens is 29 inches, while a double wall oven will generally come in at 50 ½ inches high.