The number vs. arrow direction on this sticker...
There is enough confusion between horizontal resolutions (2K, 4K etc.) and vertical ones (1080p, 2160p etc.). This is not helping; why even print a promotional sticker with a number of pixels smaller than what it should be?
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No, 1080p is 2K because its width is 1920 (close to 2000), 2160p is 4K (3840 px wide), 4320p is 8K (7680 px wide). It's not 1K, 4K and 16K.
2K is 2560x1440p though, not 1080, make a quick google search and you'll see it. It's roughly double the amount of pixels of fullHD.
Both get referred to as 2K. https://en.wikipedia.org/wiki/2K_resolution
I would prefer 2560×1440 to be called 2K5 but the industry is too comfortable with 2-letter resolutions now.