What is the name of largest, smallest and longest bacteria?

Largest Bacteria - Thiomargarita nambiensis - Gram Negative, Alpha-Proteobacteria, Chemolithotroph, Coccus. Cells of Thiomargarita namibiensis are large enough to be visible to the naked eye, attaining a size of 0.1–0.3 mm in diameter. read more

The smallest bacteria is Mycoplasma genitalium, which has a diameter of 200–300 nm. While the largest/longest bacterium is Thiomargarita namibiensis having a diameter of 100–300 micrometers(0.1–0.3millimetres). read more

Bacteria are the smallest cell organisms. Only viruses are smaller than a bacterium. Bacteria are about 10 times smaller than eukaryotic cells (cells having a nucleus, like plants and animals) and are typically 0.5-5.0 micrometers long. read more

The biggest known giant viruses are Pandoraviruses (largest genome, second largest physical size) BUT, a specimen of Pithovirusmeasures approximately 1500nm in length and 0.5 µm (500 nm) in diameter, making it the largest virus yet found. read more