Excellent match and training ball. Meets IMS International Matchball Standard criteria. Durable high gloss PU Material (PVC Free). Durable with cold conditions. Suitable for very frequent usage. Highly water resistant. Suitable for all surfaces. Size 4 ball weighs approximately 360-370 grams and has an approximate circumference of 65-66 cm. Size 5 ball weighs approximately 420-440 grams and has an approximate circumference of 68-69 cm.