Tropical Colorful SeaShells Garden Flag. Colorful Sea Shells Starfish GARDEN Flag - 119462. This colorful garden flag measures approx 12 1/2" x 18" and features a collage of colorful Sea Shells and Starfish. It is permanently dyed, with a vivid color process. It's weather proof, fade and mildew resistant. Artist: Kathleen Parr McKenna.