23 September 2026
Sheet #23
The five rounds of 23 September 2026, with the real sizes and what each measurement covers.
- 01
Measured Height of a cultivated sunflower
Young sunflowers track the sun; mature ones stay facing east.
- 02
ReferenceAdult hand18.9 cm
To size upMonarch butterfly10 cm
Measured Wingspan of a monarch butterfly
Some monarchs migrate more than 4,000 km.
- 03
ReferenceBoeing 747-876.3 m
To size upHaussmann building20 m
Measured Cornice height of a Haussmann building
19th-century rules tied the permitted height to the width of the street.
- 04
ReferenceHouse mouse17 cm
To size upAfrican elephant3.2 m
Measured Shoulder height of an adult male African bush elephant
It is the largest living land animal.
- 05
ReferenceGreat Pyramid of Giza139 m
To size upStonehenge trilithon7.3 m
Measured Height of the tallest Stonehenge trilithon
The bluestones were brought from Wales, 250 km away.