The Boston Celtics have made it to the 2025 Nba Playoffs Celebrate their epic clinch with this Boston Celtics 9FORTY Adjustable Hat from New Era. The 9FORTY is New Era's essential adjustable style and comes in a one-size-fits-most sizing. With a classic curved bill and Boston Celtics graphics on the crown, you'll be able to represent your favorite Nba team in style during the playoffs.