Projects as creative as graphic design are near boundless in terms of both project briefing and results, making it impossible to suggest even an average timescale! Ultimately, the amount of time it’ll take to get your project from idea to completion is almost completely determined by your overarching objectives and the desired result – however, factors such as the designer or design agency you select can also play a significant part in speed.
The good news, regardless of project scale or complexity, is that clients can help speed things along where needed. If you’d like to ensure your design is finished ASAP, be sure to provide your designer or agency with a full, accurate brief, and timely feedback where required.