Only size 5, and size 4 are available for this. Although this should not be a major problem as this is for recreational play and practicing purpose, so kids are ok to play with this as well. In fact, the ball that will be given away to the developing countries will be used by the kids mostly. If you are buying this for an adult go for size 5, and if you are buying for kids or youth players then better go for size 4.
It is a common misconception but, believe it or not, soccer was not actually invented in England. Although the sport, known across the pond as football, was revolutionized by the country in the mid-19th century, records actually trace its origin back over 2,000 years to ancient China. Called “association football” when it was played by the British 200 years ago, the terms “football” and “soccer” were both eventually derived from abbreviations of the longer name over time.
Soccer — or football as it's known around the world — is arguably the most loved sport on Earth. Although Americans still aren't as enamored of the sport as the rest of the world is, teams around the country are stealing hearts and minds, and Americans are getting into the game. For years, soccer has been a sport played by kids, college students, and ex-pats, but it's now being cheered in stadiums and watched on national TV. https://www.youtube.com/watch?v=DGp37du0xbQ