Iron-on patches representing 12 of the 88 constellations.
Technically, these represent the asterisms—the patters and shapes humans create from the positions of celestial objects like stars and galaxies. A constellation is defined by the region of the sky the asterism takes up (like the boundary of a state/country in which the cities would be stars.)
Yes, these happen to be the 12 constellations of the zodiac, a popular hold over from before scientific reasoning separated the discipline of astronomy from the snake oil woo woo of astrology. And although the validity of astrology has been tirelessly debunked, these are still valid constellations in astronomy.
In all seriousness, you can learn about the other 76 under appreciated constellations (and their asterisms) here.
4.25" x 2.5"