How big is 30 square centimeters?
It's about three-fifths as big as a Post-it® Note (3M)
The size of a Post-it® Note (3M) is about 54 square centimeters.
(3M) (generically sticky notes, a.k.a. repositionable notes, a.k.a. repositional notes)
It's about half as big as a Playing Card
The size of a Playing Card is about 56 square centimeters.
(ISO 216 B8 size)
It's about four times as big as a Secure Digital (SD) card
The size of a Secure Digital (SD) card is about 7.70 square centimeters.
It's about six-and-a-half times as big as a US Quarter
The size of a US Quarter is about 4.6220 square centimeters.
(United States quarter-dollar coin) (a.k.a. Quarter dollar, a.k.a. Washington quarter, a.k.a. two bits)
It's about eight times as big as a Postage Stamp
The size of a Postage Stamp is about 4 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 ten-and-a-half times as big as a US Penny
The size of a US Penny is about 2.850 square centimeters.
(United States one-cent coin) (a.k.a. Lincoln penny, a.k.a. Cent, a.k.a. One cent piece)
It's about one-fifteenth as big as an Apple iPad
The size of an Apple iPad is about 400.20 square centimeters.
(for 9.7 inch, Apple iPad Air MD785LL/B)
It's about one-thirty-fifth as big as an Airplane Tray Table
The size of an Airplane Tray Table is about 1,010 square centimeters.
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 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 forty times as big as a Nailhead
The size of a Nailhead is about 0.77740 square centimeters.
(for 11-gauge wire nai)
It's about one-three-hundred-fiftieth as big as a Bath Towel
The size of a Bath Towel is about 10,838 square centimeters.
(for Fieldcrest Luxury Solid Towels)
It's about one-one-thousand-five-hundredth as big as a King Size Bed
The size of a King Size Bed is about 40,300 square centimeters.
(North American/Australian standard; length; mattress only)
It's about 4,500 times as big as a Ballpoint Pen Tip
The size of a Ballpoint Pen Tip is about 0.007 square centimeters.
(a.k.a. Biro, a.k.a. ball pen, a.k.a. dot pen) (for medium tip)
It's about one-five-thousandth as big as a Parking Space
The size of a Parking Space is about 150,000 square centimeters.
(a.k.a Parking Stall) (average; surface lot; North America)
An average-size parking space in a North American surface lot measures 150,000 square centimeters. 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.