How many sizes of the electronic labels are represented and what kind of colors for it?

Electronic labels, also known as e-labels or e-ink displays, come in various sizes and colors. The sizes can range from small, like those used in e-readers, to larger ones suitable for electronic shelf labels (ESL) in retail environments, such as 1.54inch, 2.13inch, 2.66inch, 2.9inch, 3.5inch, 4.2inch, 5.8inch, 7.5inch, 10.2inch, 13.3inch. 

Common colors for electronic ink displays include black and white, as well as grayscale variations. Some advanced e-ink displays may also support limited color options, such as red, yellow.

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