Ontic vagueness is defended by appealing to a realist and objectivist perspective. First, ontic vagueness is distinguished from epistemic vagueness and semantic vagueness. Subsequently, the realist approach to semantics adopted by David Lewis and more recently by Theodor Sider is presented. It is argued that, contrary to what has been maintained by both Lewis and Sider, ontic vagueness is compatible with the realist perspective they endorse.