Mix the salt dough.Combine the flour, salt, and water in a mixing bowl or the bowl of a stand mixer. Blend just until combined and knead the dough to incorporate any dry bits. Roll the dough into a ball and let it rest for 15 minutes.
Preheat the oven.Set the oven to 300 degrees Fahrenheit (177 degrees Celsius). Line a large baking sheet with parchment paper.
Roll the salt dough.Divide the dough into 2 balls and set one aside. Use a rolling pin to roll out one dough ball to approximately 1/8-inch to 1/4-inch thickness. The thicker the dough, the longer it will need to bake.
Cut out the ornaments and ribbon hole.Use a 2-inch biscuit cutter or your favorite cookie cutter to cut out shapes. Use a straw to make a small hole about 1/4-inch from the edge of the ornament. Remove the excess dough and place the cutouts on the baking sheet.
Bake the salt dough ornaments.Bake the cutouts in the oven at 300 degrees Fahrenheit (177 degrees Celsius) for 45 to 60 minutes, or until they are hard but not brown. Remove them from the oven and allow them to cool completely, about 30 minutes.
Paint the ornaments.When the ornaments are completely cool, paint them. Use a brush to apply 1-2 coats of the white paint on the front, back, and sides. You can flip to paint the back when they’re dry to the touch, about 10 minutes. Let the paint dry completely, about 30-60 minutes.
Add the glitter. (Optional)Use a brush to apply a coat of glitter to all sides, the same way you painted the white layer. Let the glitter dry completely, at least 1 hour.
String the ornaments onto ribbon.Cut ribbon in lengths of approximately 12 inches. Thread a ribbon through the hole in the ornament and tie it in a knot.