There’s a million of these out there, so why not one more. Here’s a 4k 2:1 grab from a recent project, but also laid out in comparison sizes down to the 1k proxies that are currently being used to cut with. When you think of 1k compared to 4k, it’s 1/4th the resolution (which it is - 4k 2:1 =4096 x 2048. 1k 2:1 =1024 x 512). Though if you take a look at the image, you can actually fit 16 of the 1k images within the 4k frame size. Click the image for the full size tiff.