Wearing a cardigan stylishly involves versatile layering. Pair a cardigan with a casual t-shirt and jeans for a relaxed look, or layer it over a button-up shirt for a smart-casual ensemble. Experiment with textures, colors, and patterns to add depth to your outfit. You can also wear it open or buttoned up depending on the desired style, and consider adding accessories like a belt or scarf for a personalized touch.