Under The Sea Mermaid Merman King Neptune Fairy. Size: 13 inches. Mark Roberts Fairies Limited Edition Under The Sea Fairy and Mermiad Collection, Flexible and Posable Fairy Doll Decorative Collectible. Coastal Sea Beach Mermaid and Fairy Themed Decorations and Decor. By Mark Roberts Limited Edition Under The Sea Collectibles are one of the most elegantly designed products in the Gift and Home industry. Every element in each piece was designed with the highest level of detail and creativity. A piece that is undeniable of heirloom quality.