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Plus Size Stores in Boston, MA

Boston has 4 plus size stores — including 3 independent boutiques, 1 with bridal & formal, and 1 with proven extended sizes (4X+). Listings are ranked by what shoppers say (rating weighted by review count) and show size ranges and live open-now hours, so you can pick a store and go.

Saks Fifth Avenue

3.9 ★★★★☆ 655 reviews

Saks Fifth Avenue Prudential Center, 800 Boylston St, Boston, MA

Boutique alterations on site

Posh department store chain carrying designer apparel, shoes & accessories, plus home goods & more.

Cuffs & Collars by Antoine Rubini

4.9 ★★★★★ 131 reviews

entrance Use, 1 Federal Street building, Devonshire St Entrance, Boston, MA

Boutique alterations on sitegood value

Men's boutique offering upscale Italian suits, shirts & ties plus a wide selection of cuff links.

Rainbow Shops

3.9 ★★★★☆ 182 reviews

474 Blue Hill Ave, Boston, MA

Sizes 14–20

Bridal & formal Extended sizes 4X+ good value

Apparel chain offering fashionable clothing for women, men & kids, as well as shoes & accessories.

Johnny Was

3.5 ★★★★☆ 17 reviews

800 Boylston St space 141, Boston, MA

Boutique

Good to know in Boston

One Boston store has a known size range so far — roughly sizes 14–20, shown on its listing. All 4 stores with posted hours are open on Sundays.

For curated racks and an owner who knows the inventory, the boutiques here are Saks Fifth Avenue, Cuffs & Collars by Antoine Rubini and Johnny Was.

For depth past 4X — proven on the store's own site, not promised — Rainbow Shops stocks extended sizes (4X+ / size 26+).

Dress shopping for an event?

This store shows real bridal or formal evidence — from the store's own site or shopper reviews, not a guess. Plus size gowns to actually try on, whether it's a wedding, prom, or mother-of-the-bride.

Plus size stores near Boston