FIFA Quality Pro is the highest accolade that can be awarded to any ball and is reserved for only the best standard of match ball available. To gain this, the ball design must go through seven rigorous tests at a neutral ball testing facility in Switzerland. (below based on a size 5 football)

Circumference: Must have a circumference between 68.6 and 69.5 cm.
Roundness: When fully inflated, the roundness of the ball may not vary by more than 1.5%.
Rebound: The rebound should be between 135cm and 155cm when the ball is dropped 10 times from a height of 2m onto a steel plate.
Weight: Must weigh between 420 and 445 g.
Loss of pressure: The loss of air must not exceed 20%.
Water absorption: When immersed in a tank of water and squeezed and turned 250 times, the ball must not absorb more than 10% of its capacity in water.
Shape and size retention: This test is designed to ensure the ball can keep its shape under all conditions. The ball is fired at a steel plate at 50 km/h no fewer than 2,000 times. Only balls which show no signs of damage and whose circumference does not change by more than 1.5 cm can receive the certification.