How big is 0.0000050 square kilometers?

A King-Size mattress measures 0.000004030 square kilometers in total area. Although most antique beds were smaller than modern beds, it was not uncommon for beds in the medieval Europe to reach 0.00000500 square kilometers for those in positions of wealth or power.

An average-size parking space in a North American surface lot measures 0.0000150 square kilometers. Due to the high real estate prices at the time, parking spaces in a densely-populated part of Manhattan would sell for an average of $165,000 in 2007, with some spaces fetching up to $225,000.

Bath towels typically measure 142.24 cm (56 in) by 76.2 cm (30 in), for a total area of about 0.00000108380 square kilometers. The city of Bursa, Turkey is known as the birthplace of the modern towel.

With wide variation among different models of airplanes, in-flight tray tables measure around 41.2 cm (16.5 in) x 24.1 cm (9.5 in) for a total area of 0.0000001010 square kilometers. Flight safety rules require that the tray tables be upright and locked during takeoff and landing so as to reduce the risk of passenger abdominal injury.

Per International Tennis Federation Rules of Tennis 2009, a doubles tennis court should measure 23.7744 m long by 10.9728 m, for a total area of about 0.00026076 square kilometers. Courts may be surfaced with crushed red stone, shale, brick, hard-soil grass, or asphalt.

An IMAX movie theater screen measures 22 m (72 ft) by 16 m (52 ft) for a total area of 0.0003542 square kilometers. Because the film used in an IMAX movie is more than eight times larger than regular film, the platters of a two-and-a-half hour feature film can weigh up to 250 kg (550 lbs).

Per NBA rules , a basketball court should measure 29.5656 m long by 16.764 m wide, for a total area of 0.0004956377184 square kilometers. The first basketball game, held in a Springfield Massachusetts YMCA, was played on a court half the size of today's NBA standard and ended with a score of 1-0.

An Apple iPad measures 23 cm (9.4 in) x 17 cm (6.6 in) for a total device area of 0.000000040020 square kilometers. The base model iPad Air features 16 GB of storage capacity.

The United States Bullion Depository, commonly referred to by the metonym "Fort Knox" (in spite of the fact that the Depository is not located on the Fort proper), measures 32.0 m (105 ft) by 36.9 m (121 ft), for a total area of about 0.00118 square kilometers. The Depository is most famous for housing the largest portion of the national gold reserve, but has also temporarily housed the original US Declaration of Independence, an original copy of the US Constitution, and other important documents, kept there for safe keeping during World War II.

Manchester Cathedral includes a total interior area of 0.001238 square kilometers between the Nave, Chapel, Library, Chapter House, and Rectory. The height of the Cathedral's bell tower is 41.1 m.

Per National Hockey League Official Rules, a hockey rink should measure 60.96 m long by 25.908 m wide with a corner arc radius of 8.5344 m, for a total area of about 0.00151682874 square kilometers. Ice hockey is believed to have developed from field hockey after players began holding games on ice rinks, which had been traditionally used for the sport of curling.

A single ISO 216 B8-size playing card measures 0.00000000560 square kilometers. Although this size is the most common playing card, many casinos use the smaller "bridge size" card — 0.00000000260 square kilometers smaller.

One of the largest homes in the world, Bill and Melinda Gates' home has a total area of 0.004474 square kilometers, including 7 bedrooms, 24 bathrooms, 6 kitchens, 6 fireplaces, a 0.00023 square kilometers gym, a 0.0000900 square kilometers dining room, and a 0.00019 square kilometers library. It was designed by Bohlin Cywinski Jackson, the same architectural firm responsible for the design of one of Apple Inc's flagship stores on Fifth Avenue in New York City.

A Post-it® Note measures 0.00000000540 square kilometers in total area. In September, 1989, Hurricane Hugo swept through Charleston, South Carolina with winds up to 230 kph (140 mph), uprooting eight oak trees in Mr. Bruce Brakefield's yard, but leaving in place a Post-it® note attached to his front door.

Per NFL rules, a football field should measure 109.728 m (120 yards) long by 48.768 m wide, for a total area of 0.005351215104 square kilometers. Due to a blizzard, the first NFL playoff game in 1932 was held indoors in Chicago Stadium (it was also the first indoor game) on a field measuring just 55 m by 40.0 m, for a total area of 0.0022 square kilometers.