Size 3 Machine-Stitched Football Training Ball

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Between 68 and 70 cm (size 5).Between 63.5 and 66 cm (Size 4).

We inflate the ball to the recommended pressure of 0.8 bar. After 72 hours, its pressure must have decreased by no more than 15% (around 0.1 bar), ensuring that the remaining pressure is around 0.7 bar. This means that it\'s perfectly normal for the ball to lose a little pressure over a few days. Pump it back up regularly to keep it in good condition.

We analyse the ball\'s sphericity at 4500 different points and then measure any discrepancies. The average variation must be no more than 1.8% (in accordance with FIFA BASIC rules). If the ball goes beyond this threshold, our engineers intervene to optimise its shape and guarantee an even, precise bounce with every kick!

Between 410 and 450g (Size 5)Between 350 and 390g (Size 4)

It\'s important that young footballers have a ball that\'s the right size. That\'s why our design teams have developed the Training Ball, so that every age category has just the right ball. Size 4 between 9 and 12 years. Size 5 for over 12 year olds. In addition, we have conducted numerous lab and field tests to guarantee the ball\'s ability to withstand every hit.

The most demanding test that this ball is subjected to is the machine shot test. The ball must resist up to 2500 shots against an inclined flat concrete slab at 50 km/h at a distance of 2.5 m. At the end of the test, we check: - the ball\'s general state: the stitching must withstand this test. - the circumference: it must not have increased by more than 1.5 cm. - the sphericity: it must not have varied by more than 1.8%. - the pressure: loss of pressure must not exceed 12.5%.

We simulate rainy playing conditions in a lab by leaving the ball to sit in 2 cm of water on a rotating base whilst subjecting it to 250 compressions. At the end of the test, the ball must have absorbed no more than 15% of its initial weight.

For size 5: Between 125 and 155 cm with a maximum difference of 10 cm between the ball\'s highest and lowest bounce. Each ball is dropped 10 times on a steel plate from 2 metres in height.For size 4: Between 115 and 155 cm with a maximum difference of 10 cm between the ball\'s highest and lowest bounce. Each ball is dropped 10 times on a steel plate from 2 metres in height.