To find this information, you'll need to consult a reliable source such as:
* The EPA's FuelEconomy.gov website: This is often the most accurate source for official measurements, but may not list hip room specifically; it may list rear shoulder room or overall rear passenger space.
* Edmunds, Kelley Blue Book (KBB), or other automotive review sites: These sites usually compile specifications, including interior dimensions, from various sources. Search for "2012 Ford Fiesta specs" on these websites.
* The original Ford Fiesta owner's manual: This manual should contain detailed specifications, including interior dimensions.
Keep in mind that "hip room" is not always a standardized measurement across all sources. You'll likely find related measurements like rear shoulder room or overall rear seat width, which will give you a general idea of the available space.