Lee's Custom Lumber specializes in custom-made plaques, signs, and lumber for woodworking projects. They offer a variety of wood types such as Cedar, Walnut, and other available woods, along with special cut shapes and sizes. Additionally, they provide Cedar Tree cookies in various sizes and diagonal cuts for table tops. The company also offers custom design services for plaques, signs, and craft projects, allowing customers to bring their ideas for on-the-spot design and visualization. Lee's Custom Lumber operates at Riverside Trade Days in Longview, Texas, on specific weekends, providing a unique selection of woodworking materials and personalized design solutions.