Plus Size Stores in O'Fallon, IL
O'Fallon has 2 plus size stores — including 1 independent boutique, 1 with bridal & formal, 1 with men's big & tall, and 2 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.
Ann's Bra Shop
4.2 ★★★★☆ 168 reviews
Lingerie store offering bras, mastectomy products, and swimwear, with fittings available by appointment.
Rainbow Shops
4 ★★★★☆ 110 reviews
Apparel chain offering fashionable clothing for women, men & kids, as well as shoes & accessories.
Good to know in O'Fallon
One O'Fallon store has a known size range so far — roughly sizes 14–20, shown on its listing. 1 of the 2 stores with posted hours are open on Sundays.
For curated racks and an owner who knows the inventory, the boutique here is Ann's Bra Shop.
For depth past 4X — proven on the store's own site, not promised — Ann's Bra Shop and Rainbow Shops stock 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.
- Ann's Bra Shop ★★★★☆ 4.2 (168)
Shopping for him?
This store carries men's big & tall — evidence from the store's own site or shopper reviews, not a guess.
- Ann's Bra Shop ★★★★☆ 4.2 (168)