21 inches
Aspect ratio 16:9
- 17 inches×1.71
- 19 inches×1.37
- 20 inches×1.24
- 21 inches×1.12
- 22 inches×1.02
- 24 inches×0.86
- 27 inches×0.68
- 28 inches×0.63
- 32 inches×0.48
- 40 inches×0.31
- 43 inches×0.27
- 48 inches×0.22
- 50 inches×0.2
- 55 inches×0.16
- 60 inches×0.14
- 65 inches×0.12
- 70 inches×0.1
- 75 inches×0.09
- 80 inches×0.08
- 85 inches×0.07
- 98 inches×0.05
Metric
- Kilometre (km)4.27×10⁻⁴ x 3.2×10⁻⁴
- Metre (m)0.43 x 0.32
- Decimetre (dm)4.27 x 3.2
- Centimetre (cm)42.67 x 32
- Millimetre (mm)426.72 x 320.04
- Micrometre (µm)426,720 x 320,040
- Nanometre (nm)426,720,000 x 320,040,000
- Angstrom (Å)4.27×10⁹ x 3.2×10⁹
British/American
- League8.84×10⁻⁵ x 6.63×10⁻⁵
- Mile (mi)2.65×10⁻⁴ x 1.99×10⁻⁴
- Furlong2.12×10⁻³ x 1.59×10⁻³
- Chain0.02 x 0.02
- Rod (rd)0.08 x 0.06
- Yard (yd)0.47 x 0.35
- Foot (ft)1.4 x 1.05
- Link2.12 x 1.59
- Hand4.2 x 3.15
- Inch (in)16.8 x 12.6
- Line168 x 126
- Mil (mil)16,800 x 12,600
- Thou (thou)16,800 x 12,600
Nautical
- Nautical mile2.3×10⁻⁴ x 1.73×10⁻⁴
- Fathom0.23 x 0.18
Astronomical
- Parsec (pc)1.38×10⁻¹⁷ x 1.04×10⁻¹⁷
- Light year4.51×10⁻¹⁷ x 3.38×10⁻¹⁷
- Astronomical unit (AE)2.85×10⁻¹² x 2.14×10⁻¹²
- Light minute2.37×10⁻¹¹ x 1.78×10⁻¹¹
- Light second1.42×10⁻⁹ x 1.07×10⁻⁹