Explore Flags by Statutory Proportion
A flag's height-to-width aspect ratio is a defining geometric property codified in national flag statutes—and frequently the single clearest distinction between otherwise similar designs such as Monaco (4:5) and Indonesia (2:3).
Statutory aspect ratio hubs
| Ratio (H:W) | Decimal width | Flags in catalog | Vexillological profile |
|---|---|---|---|
| 2:3 | 1:1.500 | 22 | The single most widespread statutory proportion in modern vexillology, used across European, African, Asian, and American tricolors, bicolors, and emblem flags. |
| 1:2 | 1:2.000 | 3 | A long maritime proportion favored by the United Kingdom, Ireland, Cuba, and Commonwealth ensigns where high wind speeds demand extra fly length. |
| 3:5 | 1:1.667 | 3 | Close to the golden ratio (1:1.618), used by Germany, Luxembourg, and Bangladesh for balanced land and ceremonial display. |
| 5:8 | 1:1.600 | 3 | A classic Northern European and Pacific proportion used by Poland, Sweden, and Palau (10:16). |
| 1:1 | 1:1.000 | 1 | Symmetric square banners descending from medieval heraldic standards, represented among sovereign states by Switzerland (and Vatican City). |
| 8:11 | 1:1.375 | 1 | Determined by Norway's 16:22 fimbriated Nordic cross grid (6:1:2:1:6 vertically by 6:1:2:1:12 horizontally). |
| 10:19 | 1:1.900 | 1 | The statutory government hoist-to-fly proportion of the United States flag fixed by Executive Order 10834. |
| 13:15 | 1:1.154 | 1 | Belgium's distinctive near-square 260×300 cm constitutional flag proportion—often flown at 2:3 for civil use but legally fixed at 13:15. |
| 18:25 | 1:1.389 | 1 | Iceland's statutory 18×25 unit Nordic cross proportion established by the 1944 Law on the National Flag. |
| 11:18 | 1:1.636 | 1 | Finland's statutory 11×18 unit Siniristilippu grid (4:3:4 vertically by 5:3:10 horizontally). |
| 7:10 | 1:1.429 | 1 | The historical 7:10 proportion of Japan's 1870 Dajōkan Proclamation No. 57 civil merchant ensign. |
| 4:5 | 1:1.250 | 1 | Monaco's statutory near-square 4:5 hoist-to-fly proportion—a critical geometric difference from Indonesia's wider 2:3 bicolor. |
| 28:37 | 1:1.321 | 1 | Denmark's statutory Dannebrog proportion resulting from the 1748 regulation fixing vertical units at 12:4:12 (28) and horizontal units at 12:4:21 (37). |