The methods to distinguish the quality of footballs mainly include observing the size, material, elasticity, stability, brand and price, surface workmanship, texture, air holes, and actual trials. ‌

‌Size and weight‌: The size of a regular match football is a No. 5 ball and weighs 420-450 grams. If used for training, you can choose No. 3, No. 4, and No. 5 balls according to personal needs.

‌Material‌: Footballs are usually made of leather, synthetic materials, and rubber materials. Leather footballs have better feel and ball control performance, but require maintenance and are more expensive. Footballs made of synthetic materials and rubber materials are more durable and economical, but may not have the feel and ball control performance of leather footballs.

‌Elasticity‌: A good football should have appropriate elasticity, allowing players to better control the ball.

‌Stability‌: The stability of a football is also very important. Footballs with poor stability are prone to deviate from their trajectory or deform in the air, affecting the effect of the game or training.

‌Brand and price‌: Footballs from well-known brands are usually of better quality, but they are also more expensive.

‌Surface workmanship‌: Observe the surface of the football. The workmanship is very important. The surface of a good football is tightly made without cracks.

‌Texture‌: You can feel its quality by touching the football. A good football feels very symmetrical, while a football with quality problems will feel bulging or uneven.

‌Air eye‌: When buying a football, you can check the air eye. If there are bubbles, it means that the football is leaking, so you can't buy it.

‌Actual trial‌: Finally, test the quality of the football by actually kicking the ball. A good football feels comfortable to kick, rolls smoothly, and has good stability and controllability.

In summary, choosing a good football requires considering many aspects, including size, material, elasticity, stability, brand, workmanship, texture and actual trial, etc., to ensure that the purchased football can meet the use needs and provide a good sports experience‌.