Round factory trash cans do not have one single standard diameter. Industrial and commercial round bins are usually sized by gallon capacity, and the diameter changes by model. Common diameters are roughly 12–16 inches (30–41 cm) for 7–10 gallon bins, 15.5–19.5 inches (39–50 cm) for 10–20 gallon bins, about 22 inches (56 cm) for 32 gallon bins, about 24 inches (61 cm) for 44 gallon bins, and about 26 inches (66 cm) for 55 gallon bins. Heavy-duty steel factory bins may vary, but the general range is about 12–26 inches.
Can they fit under a standard counter? A standard kitchen or commercial counter is usually about 36 inches (91 cm) high. The actual clearance from the floor to the underside of the counter is often 34–35 inches (86–89 cm). That means height usually matters more than diameter when you are trying to slide a bin under an open counter. Many 20–44 gallon round factory bins are around 23–32 inches tall, so they may fit under an open counter. A 55 gallon bin may be about 33.5 inches tall and could fit only if the clearance is at least 34 inches and no lid adds height.
If “under a standard counter” means inside a base cabinet, diameter becomes critical. Standard base cabinets are about 24 inches (61 cm) deep, with an interior depth of about 22–23 inches. A round bin wider than about 20 inches will be difficult or impossible to place inside a standard cabinet. Door openings and plumbing under a sink reduce usable space even more. For a typical under-counter cabinet, choose a round bin no more than 16–18 inches in diameter and no more than 24–30 inches tall. In a wider 30–36 inch cabinet, a 20 inch diameter bin may fit, but you must measure the door opening and interior depth.
The bottom line: round factory trash can diameters commonly range from 12 to 26 inches. They can fit under a standard counter only if both the height and the footprint match your clearance. For a standard under-counter cabinet, most 32 gallon and larger factory bins will not fit. Smaller 10–20 gallon round bins are the safer choice. Always measure floor-to-counter clearance, cabinet width, cabinet depth, door opening, and any plumbing before buying.
