Petite woman here. If you’re looking for dress-shop level formal, try Bloomingdale’s or similar. They’d be more likely to have an assortment of sizes off the rack. And I just googled “bridal pantsuit” images and besides it being so inspiring, there were a few cute styles specifically at Bloomy’s. I love the variety of options, and they’re far more than just basic white suits. And my gosh the jumpers are great.