The NBA has reportedly mandated that all 30 teams submit the precise height and age for every player within the first week of training camp, according to Marc Stein of The New York Times.

As reported by Stein, the change stems after the age of Buddy Hield was incorrectly recorded in 2018. Hield said prior to a game on his birthday that he had just turned 26 but every media outlet, including NBA.com, had Hield turning 25 instead.

The NBA also wants to verify each player is actually at their listed height. Oftentimes, players’ heights are embellished for a variety of reasons. Kevin Durant has infamously said he doesn’t want to be considered a 7-footer and has been listed at 6-foot-9 throughout his career, a height believed to be incorrect.

NBA teams were notified this week that they must certify and submit the precise height and age for every player within the first week of training camp, league sources tell @NYTSports — Marc Stein (@TheSteinLine) September 26, 2019

With the new changes, many will be curious to see how players’ heights will be affected, especially some incoming rookies.

Zion Williamson’s actual size has long been under the microscope as the No. 1 overall pick did not have his measurements taken at the NBA Draft Combine. He is currently listed at 6-foot-7, 285 pounds on the Pelicans’ training camp roster, though weight is not required to be taken in the new mandate since it often fluctuates.

Teams will measure players’ heights without shoes so it appears as though many listed heights will change by an inch or two. With training camp set to begin for most teams on Oct. 1, the updated measurements for players across the NBA will likely be available by the start of the regular season, at the latest.