As of 2014 according to brand consultants interbrand these ten fashion brands are the biggest in the world. One thing you will notice with these brands is that they are either incredibly high end or really average everyday brands.
1. Louis Vuitton $22,552m

2. H&M $21,083m

3. Nike $19,875m

4. Zara $12,126

5. Gucci $10,385m

6. Hermes $8,977m

7. Cartier $7,449m

8. adidas $7,378m

9. Prada $5,977m

10. Tiffany & Co. $5,936m

h/t Airows