MILFORD, CONN. — Select Subway restaurants in Illinois, Nevada and Virginia will begin offering fresh-baked King’s Hawaiian bread on June 27 as part of a partnership between the quick-service restaurant chain and the Torrance, Calif.-based baker.

Subway will become the first Q.S.R. to bake King’s Hawaiian’s signature bread fresh in its restaurants. The bread will be available in a new custom size: 8 inches.

The bread initially will be tested in more than 300 Subway restaurants throughout Champaign, Ill.; Reno, Nev.; and Richmond, Va.

“These new sandwiches are unlike anything out there, and Subway is offering guests a chance to try this iconic bread like they never have before — freshly baked,” said Len Van Popering, chief brand and innovation officer at Subway. “We’re excited to be the only restaurant in the world trusted to serve King’s Hawaiian bread this way.”

Mark Taira, chief executive officer of King’s Hawaiian, described the partnership with Subway as “a unique and exciting opportunity.”

“Subway’s commitment and love for baking fresh bread matches our own, and we look forward to guests being able to enjoy our joint passion,” Mr. Taira said.

The bread will be available in select locations from June 27-Sept. 4.

While this is King’s Hawaiian’s first partnership in which its bread will be baked fresh on site, it is not the first time the baker has partnered with a food service provider. In 2018, King’s Hawaiian teamed up with IHOP Restaurants to offer French toast menu items featuring the baker’s signature King’s Hawaiian sweet bread. King’s Hawaiian also for several years has teamed with Arby’s to offer its buns as an option for certain Arby’s sandwiches.