It's about one-and-one-fourth times as big as a King Size Bed
In other words, 0.0005 hectares is 1.24 times the size of a King Size Bed, and the size of a King Size Bed is 0.806 times that amount.(North American/Australian standard; length; mattress only)
A King-Size mattress measures 0.000403 hectares in total area. Although most antique beds were smaller than modern beds, it was not uncommon for beds in the medieval Europe to reach 0.0005 hectares for those in positions of wealth or power.
It's about one-third as big as a Parking Space
In other words, 0.0005 hectares is 0.333 times the size of a Parking Space, and the size of a Parking Space is 3 times that amount.(a.k.a Parking Stall) (average; surface lot; North America)
An average-size parking space in a North American surface lot measures 0.0015 hectares. 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.
It's about four-and-a-half times as big as a Bath Towel
In other words, 0.0005 hectares is 4.6134 times the size of a Bath Towel, and the size of a Bath Towel is 0.21676 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 0.00010838 hectares. The city of Bursa, Turkey is known as the birthplace of the modern towel.
It's about 50 times as big as an Airplane Tray Table
In other words, 0.0005 hectares is 49.5 times the size of an Airplane Tray Table, and the size of an Airplane Tray Table is 0.020 times that amount.(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 0.00001010 hectares. 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 one-fiftieth as big as a Tennis court
In other words, 0.0005 hectares is 0.01916651 times the size of a Tennis court, and the size of a Tennis court is 52.174348 times that amount.(per ITF specification; for doubles)
Per International Tennis Federation Rules of Tennis 2009, a doubles tennis court should measure 23.7744 m long by 10.9728 m, for a total area of about 0.026076 hectares. Courts may be surfaced with crushed red stone, shale, brick, hard-soil grass, or asphalt.
It's about one-seventieth as big as an IMAX screen
In other words, 0.0005 hectares is 0.0141 times the size of an IMAX screen, and the size of an IMAX screen is 70.82 times that amount.(standard)
An IMAX movie theater screen measures 22 m (72 ft) by 16 m (52 ft) for a total area of 0.03542 hectares. Because the film used in an IMAX movie is more than eight times larger than regular film, the platters of a two-and-a-half hour feature film can weigh up to 250 kg (550 lbs).
It's about one-one-hundredth as big as a Basketball court
In other words, 0.0005 hectares is 0.0100880135 times the size of a Basketball court, and the size of a Basketball court is 99.12754369 times that amount.(per NBA regulation)
Per NBA rules , a basketball court should measure 29.5656 m long by 16.764 m wide, for a total area of 0.04956377184 hectares. The first basketball game, held in a Springfield Massachusetts YMCA, was played on a court half the size of today's NBA standard and ended with a score of 1-0.