I'm attempting to add an image to this infobox, and would like the image to both a) be as wide as the infobox in its current form allows it to be and b) appear in its original quality.
However, despite trying several different resolutions, the image continues to either fill the infoxbox width but appear in low quality or be smaller than the infobox width but appear in its original quality.
Originally the image was 512x256p, so it filled the width of the infobox, but for some reason it appeared in blurry low quality as if it were a very low-res image.
Next I tried 256p and 250p, which appeared in the intended quality but were less than the width of the infobox and so appeared smaller and did not take up all available space.
Finally searching revealed that infoboxes are normally 270p wide (unsure if this is true) so I tried a 270p image; this filled the width of the infobox but bizarrely had low-res blurry quality just like the 512p version.
If someone knows the actual pixel width of an image so that it fills the width of an infobox while retaining its original quality, or perhaps can explain why e.g. a 512p image looks like a 100p image, I would greatly appreciate some assistance!
Note: Currently it is 270p, filling the infobox while appearing blurry.