Here are some high-end fashion brands that offer plus size options:

1. Christian Siriano: This brand, founded by designer Christian Siriano, is known for its inclusive and diverse fashion offerings. The brand offers a range of sizes, celebrating all bodies types.

2. Prabal Gurung: This high-end fashion brand is known for its elegant and sophisticated pieces. The brand offers a range of sizes, including plus sizes, in its collections.

3. Marina Rinaldi: This Italian fashion brand is known for its elegant and stylish clothing options for plus size women.

4. 11 Honore: This high-end fashion brand is dedicated to providing stylish and fashionable options for plus size women.

Overall, these high-end fashion brands are offering stylish and fashionable options for plus size women, making it easier for them to find clothing that fits and flatters their bodies.