Question: are there different volleyball sizes?
Answer: There are two different styles: youth and adult. The youth volleyball ball for indoor use is 63 to 65-centimeters or 25 to 26-inches in circumference. They weigh 9.2 to 9.9 ounces, or 260-280-grams. ... The adult indoor volleyball ball is 65 to 67-centimeters or 25.5 to 26.5-inches in circumference.