The best oven size depends on two factors: the amount of available space in your kitchen and the foods you cook. The oven must sit level with your counters and fit into the horizontal and vertical opening. The internal space should be large enough to fit your favorite meals.
To select the correct oven size, you must measure your space carefully. Ovens come in a variety of sizes, with standard models measuring between 27 and 30 inches wide. Consider the installation style as well. An oven that slides into an opening requires a slightly wider opening than one that drops in. Freestanding models offer greater width flexibility, as they do not need to sit between two countertop sections. If you choose this option, the oven should not overlap a door frame or impede the flow of traffic.
Interior space is a less obvious consideration. A compact oven designed for apartments and small kitchens may not be big enough to fit a full-sized roaster. For one person, an oven with 2 or 3 cubic feet of internal space is usually sufficient, while a small family might need between 3 and 4 cubic feet. If you frequently cook for large groups, an oversized professional oven may be a better choice. Look for models with a capacity of 4 cubic feet or more.