Pete Alonso has a plus-sized hat to match his new Orioles contract.

The now-former Mets slugger was introduced in Baltimore on Friday, and donned some special attire for the moment.

He added a mascot-sized hat to his black suit, cowboy boots and orange belt with a pocket square for a picture with The Oriole Bird — captioned by the Baltimore social team with “New best friend.”

Pete Alonso put on a massive Orioles hat to begin his Baltimore tenure in style. Orioles/Instagram

Alonso, the recipient of a five-year, $155 million deal from the Orioles, will now call Camden Yards his home after spending the first seven years of his big league career mashing home runs at Citi Field in Queens.

Among the other changes for the Mets’ all-time home run leader with 264 dingers in his career, is a

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