Shaw's, the US arm of Sainsbury's, has launched an 'urban market' store type, which will provide the template for future city centre openings.
The Boston shop covers 3,715 sq m in the Prudential Center, Boylston Street, and replaces Shaw's Star Market store, which was half the size.
The design will be introduced to more stores later this year as part of Shaw's planned expansion and remodelling programme. The 185-store chain intends to open and relaunch 37 shops this year.
The concept, labelled Marketfresh in the City, aims to emulate a city market, with open ceilings, concrete floors and wall graphics, including historical photographs.
The shop will provide a wider variety of fresh foods, segmented into different areas. There will be a Marketfresh zone with seafood, meat and an in-store bakery; a Wild Harvest natural foods area; and a carving station called A La Carte.
An international Shop the World section is designed to appeal to Boston's ethnic groups, stocking foods from Italy, Ireland and Japan, as well as an Hispanic range.
The store, which is badged with a new logo, also features a glass atrium to allow shoppers to look out on to the street.
Chief executive officer Paul Gannon said: 'We want to be the best at tailoring our store to the community.'
Last year, Shaw's hit sales of US$4.4billion (£2.73 billion).