If you are unsure of which size to get your child, I will recommend what size I think based off real-world use. The size 3 is good for any child until about first grade or second grade, which is when a child should move into a size 4. The size 4 should last until they get to middle school (around 6th or 7th grade), and then they would move into the adult official size 5.
We covered the quality in small detail above, but we’ll look into a little further here.  The quality of the ball you pick is very important.  If you want exactly what the pros play with, then you will have to pay a little more as a result of picking the premium choice. Those balls fly better and more true than their counterparts, but they are not meant to be practiced with on a regular basis.  Premium balls tend to have a softer impact on both your cleats and ankle guards to allow for more ball control and handling.  After the “premium” match ball category is the “match ball” category.  These aren’t nearly as expensive as the premiums are, but are still very good in match situations.  These aren’t meant for practice, but they typically can hold up for extended periods of time, possibly a season or two.  The third type is “training balls.”  These balls are meant for training and practice, and they can be used continuously without doing damage to it.  I have some great training balls that have lasted upwards of six years!  The quality of training balls has gone up drastically over the years that I have been playing.  When I was younger, some of them were so hard that you’d feel like your foot was broken after kicking them.  Nowadays, they literally feel like a premium ball with their softness and their flight.  So, almost any ball is great nowadays from the right supplier!
This soccer ball offers the traditional look and design of the pentagon panels in alternating black and white, allowing players to learn foot placement for a good bend. There is enough weight to the ball to allow for accurate crossing and passing drills, while enough rebound exists for dribbling and shooting drills. If you take your game seriously and you want to improve at home, this is one of the best and most affordable options that you’ll want to consider. Multiple sizes are available with this traditional design.
Of course, no one should truly expect this ball to be made for an organized league game since its primary selling point is that it glows in the dark. This soccer ball features two red LED lights that are powered by the same kinds of batteries used for watches. Even better, the batteries themselves are easy to change out and even have a specialized tool to assist in doing so. To prevent the batteries from running out too quickly, the ball is kick-activated and stays lit for 40 seconds.

Soccer balls come in different variants and choosing one that is right will depend on how you prefer your ball and how you would like to use it. Soccer balls are built of different materials mostly made out of common rubber, polyurethane, nylon or polyvinyl chloride. While polyvinyl chloride balls can get really durable, they may not be as soft and touch responsive as polyurethane blend balls.
Today's footballs are more complex than past footballs. Most modern footballs consist of twelve regular pentagonal and twenty regular hexagonal panels positioned in a truncated icosahedron spherical geometry.[4] Some premium-grade 32-panel balls use non-regular polygons to give a closer approximation to sphericality.[12] The inside of the football is made up of a latex bladder which enables the football to be pressurised. The ball's panel pairs are stitched along the edge; this procedure can either be performed manually or with a machine.[5] The size of a football is roughly 22 cm (8.65 inches) in diameter for a regulation size 5 ball. Rules state that a size 5 ball must be 68 to 70 cm in circumference. Averaging that to 69 cm and then dividing by π gives about 22 cm for a diameter.
Adidas says its design was motivated by Russia's urban landscapes. It uses textured graphics and a metallic sheen to bring a modern look to the classic design. The ball is made of six panels of thermally bonded TPU and about 15% silicone. The materials allow for better trajectory, accuracy, responsiveness, and low water absorption. It also feels well-padded and slightly lighter than previous match balls.