In 1937, the regulation soccer ball put on a little weight, increasing from 13-15 ounces to 14-16 ounces. Soccer balls used to be made exclusively of leather. Not so these days! Current technologies have come up with leather-like synthetic materials that are softer, more lightweight, water-proof, and perform as well if not better than leather soccer balls. As for the look, early soccer balls were tan but difficult to see from the stands; although white leather-washed soccer balls are known to have been used. White soccer balls replaced their tan predecessors in the 1950s, and were composed of 18 panels. Black spots were added to allow soccer players to track the ball's swerve. Today's soccer balls come in an array of colorful designs and styles to suit every player.
This 12-oz. ball works for players between 8 and 12 years old and has a circumference of 26 inches, larger than a size 3 and smaller than the size 5. This age group tends to play on a field of about 30 to 50 yards, writes Deborah W. Crisfield in "The Everything Kids' Soccer Book," with a goal size of around 6 feet high and 18 feet long. Again, the scale for the U12s falls between that of the U8s and that of the older age brackets for the No. 4 ball and the game as a whole. Some leagues may limit the No. 4 ball to U10s instead of U12s, so check league rules before making a purchase.
On the other hand, replicas (sometimes called training balls or gliders) are designed to be just like the official match balls but are much cheaper. Their panels are often stitched rather than thermally-bonded and are made of a different material. However, they’re not necessarily less durable than official match balls. So, they’re the recommended option for most players. https://www.youtube.com/watch?v=j2Xn84L3Kcs