How do.I know what color to choose

It's a Cream Highlighter Stick...all of the shades are universally flattering. So, just pick whichever shade you like the best, and whichever shade you want to highlight the high points of your face. You can also look at the models in the product photos and the customer review photos to see what each shade looks like. I personally love shades Nectar and Lit, but all of the shades are gorgeous! (Nectar is the bestselling shade, but just pick whichever shade is your favorite)