Abstract: A replaceable sleeve configured to cover a writing instrument. The writing instrument has a primary end located opposite a secondary end. The secondary end of the writing instrument has an outer ridge having a step. The sleeve has an end having a secondary opening located opposite another end having a primary opening. The primary opening of the sleeve receives the primary end of the writing instrument. The primary end of the writing instrument is configured to protrude from the secondary opening of the sleeve. An inner ridge is connected to an inner wall surface of the sleeve. When the sleeve covers a substantial amount of the writing instrument, the secondary end of the replaceable sleeve conforms around the outer ridge of the writing instrument. The outer ridge has a step that interlocks with the inner ridge of the sleeve, thereby, retaining the sleeve on the writing instrument.