Simple scale model of the Airbus A320 that prints as a completely flat card. When completed, the airplane is about 4 inches (102mm) nose to tail, and the rectangular "card" is roughly 3 inches (76mm) by 4.5 inches (114mm).
At that small of scale, some of the details around the windows/engines get a little muddy.
When printing with PETG, the supports that hold the airplane in the card are a bit robust. You might need side snips to get it free.
Amazon Basics PETG
Prints flat on the bottom.