We need balloons with a diameter of 20-25 cm (10 or 12 inches)
Inflate balloons.
It is necessary to calibrate the balls at the same size. To do this, we need to make the calibrator with the required dimensions garlands (we homemade particleboard shny calibrator defined sizes 5, 10, 15, 20, 25 cm) Here is an example of manufacturing a garland of 25 cm. The calibrator can successfully replace any capacity (bucket, pot diameter require
Balls must be strictly calibrated by size. It is best to do the calibration on the long side of the ball – from head to tail.
Calibrated balls couples relate to each other