I needed something big and green, and Nancy Tracy's Christmas Tree in size 10 thread fit the bill. It's a little lopsided since I didn't block it yet. Nancy generously shares a free pattern every month. You can go to her site and sign up for the newletter, which will bring you patterns, recipes, and the current specials at her online tatting store.
I'm usually not a fan of big thread, but I use it when the situation demands. After the size 10 tree, I went to the other extreme and rewound the shuttle with size 80 and made Mark Myer's Cat. So understated and elegant! This is almost 6 inches tall in size 30. In larger thread it could get huge!