[refulgentis]

They're extremely small, the photo in the article is misleading: the prose explains they're ~1 mm in size

[drvdevd]

If you find macro shots of their faces too they kinda look like dogs with a few extra eyes

[psd1]

The only time I've seen one, that I know, it was around 6mm. When it jumped, so did I!

[freilanzer]

They're from 1 to 2.5 cm in size, at least the ones in the article are - Portia.