An easy way to do is look in the least predominant color. Take it seeks to borrow accessories and shoes in the same tonality.
Everything depends on the look you want to project. If you want an ultra-modern look, combining the bag with different colors and textures. So if the shades ensures that both pieces are similar.
Those having a width not exceeding two inches are ideal. Bracelets that exceed this measure would be disproportionate in relation to your extremities.