New Arsenal signing Rob Holding will wear the number 16 this season, the number previously worn by midfielder Aaron Ramsey.
The Welshman will replace Mikel Arteta as the club's No.8.
Holding signed for Arsenal on Friday as he became manager Arsene Wenger's third summer signing.
It is unlikely that the 20-year-old will secure a regular place in the Frenchman's squad but he says he wants to learn from the likes of Laurent Koscielny and Per Mertesacker.
"There's massive competition here [in the defensive department] and it will only improve me," he told the club's official website.
"It will push me to new boundaries and hopefully I can prove my worth.
"It [leaving Bolton] was tough.
"Bolton will always have a place in my heart and I'll always be keeping an eye on their results. I've got loads of friends there and coaches who I'll still talk to there, so I'll always stay in touch and I wish them the best for the future."