The Big Four is a group of the four female international beauty pageants decided on the basis of set criteria like global prominence and prestige, worldwide media coverage, the pageants longevity, consistency, and history; production quality and global telecast; the enormity of internet traffic; and the extent of popularity amongst pageant fans across the globe.
Basically, the Big Four comprise of: Miss World, Miss Universe, Miss International, and Miss Earth.
Check out how the top participating countries have fared in all four pageants combined: