Refrigerators with top-mounted freezers are typically 36 inches, with some models being slightly thinner and some slightly wider. However, the internal dimensions are smaller and vary based on the manufacturer.
Side-by-side refrigerator and freezer models have similar overall widths, but the size of their refrigerators depends on how much room the freezer has, although most units offer more space in the refrigerator than the freezer. Depth varies a bit more on all types of refrigerators. Popular manufacturers typically offer depth ranges of approximately 30 inches to almost 36 inches, with counter-depth models being on the low end. Most homeowners who want the most refrigerator space possible may wish to look at the volume available, which is typically in gallons.