Bluebulb Projects presents:
The Measure of Things Logo
Step 1: What kind of measurement do you want to compare?
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Length
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Weight
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Area
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Data

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Equivalents in other units


How big is 30 square centimeters?

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It's about three-fifths as big as a Post-it® Note (3M).
In other words, 30 square centimeters is 0.56 times the size of a Post-it® Note (3M), and the size of a Post-it® Note (3M) is 1.8 times that amount.
(3M) (generically sticky notes, a.k.a. repositionable notes, a.k.a. repositional notes)
A Post-it® 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 Post-it® note attached to his front door.
It's about half as big as a Playing Card.
In other words, 30 square centimeters is 0.54 times the size of a Playing Card, and the size of a Playing Card is 1.9 times that amount.
(ISO 216 B8 size)
A single ISO 216 B8-size 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 four times as big as a Secure Digital (SD) card.
In other words, 30 square centimeters is 3.9 times the size of a Secure Digital (SD) card, and the size of a Secure Digital (SD) card is 0.26 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 six-and-a-half times as big as a Quarter.
In other words, 30 square centimeters is 6.491 times the size of a Quarter, and the size of a Quarter is 0.1541 times that amount.
(United States quarter-dollar 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 4.622 square centimeters.
It's about eight times as big as a Postage Stamp.
In other words, the size of a Postage Stamp is 0.1 times 30 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 US-issued "Inverted Jenny" stamp printed in 1918, which features an upside-down image of Curtiss JN-4 ("Jenny") airplane; a single stamp sold for $977,500 at a 2007 auction.
It's about eight-and-a-half times as big as a Nickel.
In other words, 30 square centimeters is 8.491 times the size of a Nickel, and the size of a Nickel is 0.1178 times that amount.
(United States five-cent coin) (a.k.a. Jefferson nickel)
The nickel, in its current design since 1938, has a diameter of 21.21 mm (0.835 in) and an area of 3.533 square centimeters.
It's about ten-and-a-half times as big as a Penny.
In other words, the size of a Penny is 0.0952 times 30 square centimeters.
(United States one-cent coin) (a.k.a. Lincoln penny, a.k.a. Cent, a.k.a. One cent piece)
The Lincoln penny, in its current design since 1909, has a diameter of 19.05 mm (0.75 in) and an area of 2.85 square centimeters.