Four measurements, in this order
Depth. A standard American counter is about 25 inches deep, and the outlets and backsplash take some of it. A countertop oven with a drop-down door needs its own depth plus the open door in front of it. Depth is the measurement most listings omit and most kitchens run out of.
Clearance above. Air fryers and toaster ovens vent upward, and the minimum gap is a published figure — in the manual, not the listing. Measure from the counter to the underside of the cabinet before choosing; about 18 inches is standard, and a tilt-head mixer with its head raised can need more.
Inside width, for anything that bakes. Quarts are a volume; a pan is a diameter. The Elite Gourmet French-door oven at $84.99 publishes its cavity at 13.25 × 13.5 × 8.95 inches and a 12-inch pizza; the Breville Mini Smart Oven at $159.95 publishes 11 × 10 × 4 inches. Most of the rest give only “a 9-inch pizza” or a slice count.
Cord reach, on anything used at a table — see below.
The one nobody measures until the evening
Cord length, on anything used at a table. Most countertop appliance cords are two to three feet. The ARLIME raclette grill at $74.99 publishes 2.5 feet — the only raclette grill sold on Amazon.com on this site to publish any figure — which puts it at the end of the table nearest the wall. More in cord length, and where the outlet is.
How to do it in five minutes
Write down five numbers before you shop: the counter depth, the height to the underside of the cabinet, the usable width between fixed units, the distance from the table to the nearest outlet, and the diameter of the pan you bake in most. Then discard everything that does not publish enough to check against them — and see clearance above and behind for the figure that lives in the manual.
Prices quoted in this text were read on 2026-10-17. The live price is at the top of the page.
What readers want to know
Which measurement is most often forgotten?
The clearance above. Air fryers and toaster ovens vent upward and makers state a minimum gap, usually in the manual rather than the listing. A standard American wall cabinet sits about 18 inches above the counter, so a tall air fryer or a tilt-head stand mixer with its head raised can run out of room. An appliance that fits the counter but not the space under the cabinets is the commonest return in this category.
Why do so few makers publish dimensions?
We do not know, but the pattern is measurable. Among the toaster ovens on this site, two publish the inside of the cavity — the Elite Gourmet French-door at 13.25 × 13.5 × 8.95 inches and the Breville Mini Smart Oven at 11 × 10 × 4 inches — and the rest give a slice count and a pizza size. Where a maker does publish, it is worth noticing.
What is a pizza size telling me?
The inside width, indirectly. A toaster oven sold for a 9-inch pizza has a cavity a little over 9 inches across; one sold for a 12-inch pizza, like the Elite Gourmet, is a different class of oven. It is the most useful figure most listings give, because a pan is a diameter and a quart count is not.
Last reviewed 17 October 2026
