6 inches: about 2-3 people serving, suitable for birthday parties, Valentine's Day, Mother's Day and other kinds of festivals.
8 inches: 3-5 people serving, suitable for birthday parties, various festivals, visiting friends and relatives.
10 inches: 5-8 people serving, suitable for birthday parties, various festivals, visiting friends and relatives.
12 inches: 8-10 people, suitable for birthday parties, various festivals, visiting friends and relatives.
14 inches: 10-12 people, suitable for company, classmates gathering.
16 inches: more than 12 people, suitable for all kinds of medium-sized celebrations.
Expanded Information:
Early Cakes
Early trade routes led to the importation of exotic spices from the Far East to the north, nuts, florals, citrus fruits, dates and figs from the Middle East, and sugarcane from the Oriental and Southern countries.
During the Dark Ages in Europe, these exotic ingredients were only available to the monks and nobility, whose pastry creations consisted of things like honeyed gingerbread and flat, hard cookies. Slowly, as trade became more frequent, the West's eating habits changed radically.
Soldiers and Arab traders returning home from the Crusades spread the use of spices and Middle Eastern recipes. Baker's guilds were also organized in several of the major commercial towns of central Europe. And by the end of the Middle Ages, spices were widely used by wealthy families across Europe, enhancing imaginative pastry baking techniques. When nuts and sugar became popular, so did marzipan, which was baked in wood-carved letterpress molds with designs associated with religious admonitions.
Cakes first originated in the West before slowly being introduced to China.
References: