The listings show belt outside diameters of 5 7/8 inches and 2 7/8 inches.
Listings show two common styles: round brushroll belts (described as round rubber) and flat power-drive belts for different Hoover upright models.
Some listings note a new replacement belt may be a bit tight when first installed and suggest stretching it slightly to ease installation and achieve a proper fit.
Some genuine Hoover belts are sold individually and are listed with an outside diameter of 2 7/8 inches.
Listings typically include explicit compatibility notes, such as a long model list under headings like “Fits the following Hoover Models:” or guidance asking buyers to check that their vacuum model number is listed.
Listings use wording such as “Genuine Hoover Belt Sold Individually” and “OEM Hoover Belts” to indicate original or OEM-style replacement belts.