Flags of Europe: A Guide to All 44

European flag design is highly patterned — the product of centuries of heraldry, the influence of the French Tricolour, and a handful of pan-national movements. Four families cover the great majority.

Family 1: Nordic crosses

An upright cross shifted toward the hoist. Denmark (white on red — the oldest continuously used national flag, since at least the 14th century), Sweden (yellow on blue), Norway (a blue cross fimbriated in white, on red), Finland (blue on white), Iceland (a red cross fimbriated in white, on blue). Norway and Iceland are colour inversions of each other and cause most Nordic-cross mistakes.

Family 2: Pan-Slavic tricolours

Red, white and blue in horizontal bands, from the Russian civil flag of 1699. Russia (white-blue-red, plain), Slovakia and Slovenia (white-blue-red with a coat of arms toward the hoist), Serbia (red-blue-white with arms), Croatia (red-white-blue with a checkerboard shield). The presence and shape of the shield separates them.

Family 3: plain vertical tricolours

France (blue-white-red — the template for the rest), Ireland (green-white-orange), Italy (green-white-red), Belgium (black-yellow-red), Romania and Moldova (blue-yellow-red; Moldova adds an eagle on the reverse and a coat of arms), Andorra (blue-yellow-red with a coat of arms). Several classic look-alike pairs live here — Ireland and Côte d'Ivoire, Chad and Romania.

Family 4: plain horizontal bicolours and tricolours

Germany (black-red-gold), Austria (red-white-red), Hungary (red-white-green), Bulgaria (white-green-red), Lithuania (yellow-green-red), Estonia (blue-black-white), Latvia (dark carmine-white-carmine), the Netherlands and Luxembourg (red-white-blue, distinguished by Luxembourg's lighter blue and longer ratio), Poland (white over red), Monaco (red over white — the reverse of Poland, and identical to Indonesia's flag), Malta (white over red with a George Cross in the canton).

The distinctive ones to memorise

• United Kingdom — the overlaid Union Jack (crosses of St George, St Andrew and St Patrick).
• Switzerland — a square flag (one of only two in the world, with the Vatican) with a bold white cross.
• Greece — nine blue-and-white horizontal stripes with a white cross on a blue canton.
• Cyprus and Kosovo — a gold silhouette of the country on the flag, a design almost unique worldwide.
• North Macedonia — a stylised golden sun with eight rays on red.
• Spain and Portugal — a red-and-yellow or green-and-red field with a large coat of arms.
• San Marino — white over light blue with the state coat of arms.
• Vatican City — yellow and white with the papal tiara and keys; square, like Switzerland's.