USAV: location of number on jersey

[FMadera]

Check USAV 4.3.3 and its subrules here.

[MCBear]

Doug, as Felix indicated, check 4.3.3 on pages 16 & 17 of the current Domestic Competition Regulations (Rules Book).

USAV 4.3.3: The players' jerseys must be numbered in a permanent manner from 1 to 99. Duplicate numbers are not allowed.
* USAV 4.3.3.1a: Uniform numbers must be clearly visible and centered on the chest and back. Each jersey must use the same color and number height for all players except the Libero.
* USAV 4.3.3.1b: Color combinations such as purple/black, dark green/black, navy/black, or navy/maroon are not distinctive enough to comply with the rules.

USAV 4.3.3.2: The numbers must be a minimum of 10 cm (4") in height on the chest and a minimum of 15 cm (6") in height on the back. It is recommended that the numbers be a minimum of 15 cm (6") in height on the chest and a minimum of 20 cm (8") on the back.

USAV 4.3.4: It is recommended that the captain have a strip on his/her jersey underlining the the number on the chest.

USAV 4.3.5: For nationally sanctioned competition, uniforms must be identical with the exception of sleeve length and the Libero player. An exception will also be made for a single manufacturer's logo or trademark on the outside of the jerseys or shorts, provided that the logo or trademark does not exceed 14.6 square cm (2-1/4 square inches).

There is no requirement concerning any specific distance from the neckline opening - that is essentially an NFHS requirement. Be sure to check with your region in case there are local adoptions other than these that may apply. In all cases, YMMV.