"Quả bóng đá tiêu chuẩn FIFA Hai tiêu chuẩn cao nhất về chất lượng quả bóng của FIFA là FIFA QUALITY & FIFA QUALITY PRO. Quả bóng tiêu chuẩn FIFA được kiểm tra nghiêm ngặt về chất lượng, trọng lượng, chu vi, độ nẩy, độ tròn, độ thoát khí, … Chất liệu quả bóng đá - Ô vải đệm. Ô vải đệm là các hình bát giác được nhìn thấy bên ngoài quả bóng. Theo tiêu chuẩn của FIFA, một quả bóng đá chứa 32 ô vải đệm, các biến thể khác có 26 hoặc 18 ô vải đệm. - Vỏ bóng: Vỏ bóng có thể làm từ PVC, PU, kết hợp cả PVC và PU hoặc da tổng hợp. Bóng làm bằng chất liệu PVC có giá thành rẻ và rất bền, chất liệu PU có chất lượng cao hơn, nhẹ hơn, bóng da tổng hợp tăng khả năng kiểm soát bóng, sử dụng cho các trận đấu chuyên nghiệp. - Ruột bóng: làm từ latex hoặc butyl: Latex mềm hơn và được nhiều người chơi chuyên nghiệp ưa chuộng còn Butyl thì có khả năng giữ không khí tốt hơn. Kích thước quả bóng đá Cách phân loại quả bóng đá đơn giản nhất là dựa theo kích thước của quả bóng. Theo cách phân loại này, quả bóng đá có 5 kích thước, trong đó có 3 dạng kích thước phổ biến gồm size 3, size 4 và size 5. - Size 3: Bóng đá size 3 có chu vi từ 23-24 inch (58.5-61cm), trọng lượng từ 11 - 12 ounce (313 - 342 gram), thường sử dụng cho các trận đấu chính thức cho trẻ em dưới 8 tuổi. - Size 4: Bóng đá size 4 có chu vi từ 25-26 inch (63.5-66cm), trọng lượng từ 11-13 ounce (313-370 gram) và thường sử dụng cho các trận đấu cho trẻ em từ 8 - 12 tuổi. - Size 5: Bóng đá size 5 có chu vi từ 27-28 inch (68.5-71cm), trọng lượng từ 14-16 ounce (397-453 gram), quả bóng đá với kích thước tiêu chuẩn cho tất cả người chơi trên 12 tuổi." Địa chỉ: Số 33, NV20A, Khu đô thị Lideco, thị trấn Trạm Trôi, Hoài Đức, Hà Nội. 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