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How big is 1.09 square feet?

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It's about as big as an Airplane Tray Table
(average)
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 1.09 square feet. 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 two-and-a-half times as big as an Apple iPad
In other words, 1.09 square feet is 2.53 times the size of an Apple iPad, and the size of an Apple iPad is 0.3953 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 0.43080 square feet. The base model iPad Air features 16 GB of storage capacity.
It's about one-tenth as big as a Bath Towel
In other words, 1.09 square feet is 0.09344 times the size of a Bath Towel, and the size of a Bath Towel is 10.703 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 11.6660 square feet. The city of Bursa, Turkey is known as the birthplace of the modern towel.
It's about eighteen times as big as a Playing Card
In other words, 1.09 square feet is 18 times the size of a Playing Card, and the size of a Playing Card is 0.06 times that amount.
(ISO 216 B8 size)
A single ISO 216 B8-size playing card measures 0.06 square feet. Although this size is the most common playing card, many casinos use the smaller "bridge size" card — 0.028 square feet smaller.
It's about nineteen times as big as a Post-it® Note (3M)
In other words, 1.09 square feet is 19 times the size of a Post-it® Note (3M), and the size of a Post-it® Note (3M) is 0.05 times that amount.
(3M) (generically sticky notes, a.k.a. repositionable notes, a.k.a. repositional notes)
A Post-it® Note measures 0.058 square feet 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 one-fortieth as big as a King Size Bed
In other words, 1.09 square feet is 0.025 times the size of a King Size Bed, and the size of a King Size Bed is 39.8 times that amount.
(North American/Australian standard; length; mattress only)
A King-Size mattress measures 43.40 square feet in total area. Although most antique beds were smaller than modern beds, it was not uncommon for beds in the medieval Europe to reach 53.80 square feet for those in positions of wealth or power.
It's about 150 times as big as a Secure Digital (SD) card
In other words, 1.09 square feet is 130 times the size of a Secure Digital (SD) card, and the size of a Secure Digital (SD) card is 0.008 times that amount.
A Secure Digital (SD) card measures 3.2 cm by 2.4 cm for a total area of 0.0083 square feet. SDXC Cards, the latest standard for the technology, will allow the cards to hold up to 2 terabytes of data.