A “remarkably well-preserved” fossil discovered in Brazil, dating back 113 million years, is now the oldest ant to have ever been found by scientists, a new study has revealed. The ancient fossil was found preserved in a limestone and “represents the earliest undisputed ant known to science,” the authors write in the study.
archived (Wayback Machine):
Too bad the article doesn’t say how big this is
In the article linked as “statement”, there’s an image with a scale:

Thank you! The Mongabay article removed the scale in the pictures.