
It's about as big as an Apple iPad.
(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 0.04002 sq. m (62.04 sq. in). The base model iPad Air features 16 GB of storage capacity.
It's about twofifths as big as an Airplane Tray Table.
In other words, 0.04002 square meters is 0.3960 times the size of an Airplane Tray Table, and the size of an Airplane Tray Table is 2.530 times that amount.
(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 0.101 sq. m. 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 seven times as big as a Playing Card.
In other words, 0.04002 square meters is 7.10 times the size of a Playing Card, and the size of a Playing Card is 0.140 times that amount.
(ISO 216 B8 size)A single ISO 216 B8size playing card measures 0.0056 square meters. Although this size is the most common playing card, many casinos use the smaller "bridge size" card — 0.0026 square meters smaller.
It's about sevenandahalf times as big as a Postit® Note (3M).
In other words, the size of a Postit® Note (3M) is 0.140 times 0.04002 square meters.
(3M) (generically sticky notes, a.k.a. repositionable notes, a.k.a. repositional notes)A Postit® Note measures 0.0054 square meters 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 onetwentyfifth as big as a Bath Towel.
In other words, 0.04002 square meters is 0.036926 times the size of a Bath Towel, and the size of a Bath Towel is 27.081 times that amount.
(for Fieldcrest Luxury Solid Towels)Bath towels typically measure 142.24 cm (56 in) by 76.2 cm (30 in), for a total area of about 1.0838 sq. m (12 sq. ft). The city of Bursa, Turkey is known as the birthplace of the modern towel.
It's about 50 times as big as a Secure Digital (SD) card.
In other words, the size of a Secure Digital (SD) card is 0.019 times 0.04002 square meters.
A Secure Digital (SD) card measures 3.2 cm by 2.4 cm for a total area of 0.00077 square meters. SDXC Cards, the latest standard for the technology, will allow the cards to hold up to 2 terabytes of data.
It's about 85 times as big as a Quarter.
In other words, 0.04002 square meters is 86.590 times the size of a Quarter, and the size of a Quarter is 0.01155 times that amount.
(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 0.0004622 square meters. 
