There isn’t a single official shopping site for women’s workwear as it can vary depending on individual preferences and location. However, there are several popular online platforms and retailers that offer a wide range of women’s workwear options. Some well-known options include:

1. Amazon Fashion (http://www.amazon.com/fashion)
2. Nordstrom (http://www.nordstrom.com)
3. Macy’s (http://www.macys.com)
4. ASOS (http://www.asos.com)
5. Zara (http://www.zara.com)
6. H&M (http://www.hm.com)
7. Banana Republic (bananarepublic.gap.com)
8. J.Crew (http://www.jcrew.com)
9. Ann Taylor (http://www.anntaylor.com)
10. Express (http://www.express.com)