Growing out an undercut can be the most significant deterrent for the style. It can take anywhere from three to 24 months for it to match up to the rest of your hair. If you’re rocking a short style, such as a pixie or crop, it won’t take as long or feel as awkward. However, if you’ve got long hair, it can feel like it’s taking forever, and you just have to be patient. Try flipping your part to cover it as it grows, or experiment with color to make the journey more fun. Of course, hairpins and styling products will also be handy.