LONDON — Jimmy Choo plc is set to become a member of the FTSE 250 group of stocks, the London Stock Exchange confirmed this week. The index tracks the 101st to the 350th largest companies on the London exchange by market capitalization, and the change in members is part of the quarterly reviews of the FTSE U.K. indices, the LSE said. Jimmy Choo’s market capitalization as of Dec. 3 is 688.15 million pounds, or $1.08 billion, and its stock price closed at 1.76 pounds, or $2.76, Thursday evening. The luxury label’s shares debuted on the London Stock Exchange Oct. 17, with a share price of 1.40 pounds, or $2.19. The changes will be implemented at the close of business Dec. 19, the LSE said, and will take effect when trading starts Monday, Dec. 22.