
It's about oneandthreetenths times as big as a Postit® Note (3M).
In other words, the size of a Postit® Note (3M) is 0.770 times 71.20 square centimeters.
(3M) (generically sticky notes, a.k.a. repositionable notes, a.k.a. repositional notes)A Postit® Note measures 54 sq. cm 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 Postit® note attached to his front door.
It's about oneandthreetenths times as big as a Playing Card.
In other words, the size of a Playing Card is 0.770 times 71.20 square centimeters.
(ISO 216 B8 size)A single ISO 216 B8size playing card measures 56 sq. cm. Although this size is the most common playing card, many casinos use the smaller "bridge size" card — 26 square centimeters smaller.
It's about onefifth as big as an Apple iPad.
In other words, 71.20 square centimeters is 0.17790 times the size of an Apple iPad, and the size of an Apple iPad is 5.6210 times that amount.
(for 9.7 inch, Apple iPad Air MD785LL/B)An Apple iPad measures 23 cm (9.4 in) x 17 cm (6.6 in) for a total device area of 400.20 square centimeters. The base model iPad Air features 16 GB of storage capacity.
It's about nine times as big as a Secure Digital (SD) card.
In other words, 71.20 square centimeters is 9.20 times the size of a Secure Digital (SD) card, and the size of a Secure Digital (SD) card is 0.110 times that amount.
A Secure Digital (SD) card measures 3.2 cm by 2.4 cm for a total area of 7.7 sq. cm. SDXC Cards, the latest standard for the technology, will allow the cards to hold up to 2 terabytes of data.
It's about onefifteenth as big as an Airplane Tray Table.
In other words, the size of an Airplane Tray Table is 14.20 times 71.20 square centimeters.
(average)With wide variation among different models of airplanes, inflight tray tables measure around 41.2 cm (16.5 in) x 24.1 cm (9.5 in) for a total area of 1,010 square centimeters. 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.
It's about fifteenandahalf times as big as a Quarter.
In other words, the size of a Quarter is 0.06494 times 71.20 square centimeters.
(United States quarterdollar coin) (a.k.a. Quarter dollar, a.k.a. Washington quarter, a.k.a. two bits)The George Washington quarter, in circulation in various forms since 1932, has a diameter of 24.26 mm (0.955 in) and an area of 4.6220 square centimeters.
It's about twenty times as big as a Postage Stamp.
In other words, the size of a Postage Stamp is 0.05 times 71.20 square centimeters.
(average; United States dimensions)A typical postage stamp measures an average of 4 square centimeters. One of the most prized stamps among collectors is the USissued "Inverted Jenny" stamp printed in 1918, which features an upsidedown image of Curtiss JN4 ("Jenny") airplane; a single stamp sold for $977,500 at a 2007 auction. 
