Yes, the current top poster has an "incorrect" aspect ratio: https://www.themoviedb.org/tv/63247-westworld/images/posters

I"ll fix it! But there are bound to be more entries like that I'm afraid.

Is there a way via the API to validate that the image I'm grabbing is the appropriate aspect ratio? I noticed that the link you sent actually shows the sizes and indicates the top poster is not in the correct aspect ratio. I'll look at the API again, but I don't think I saw that information available. These little things drive me crazy enough that making another call to grab a different poster would be worth the network overhead to me, especially since I'm caching everything!

I thought something like this might work, but it doesn't appear to actually return anything:

https://api.themoviedb.org/3/tv/1421/images?api_key=&language=en-US

There is no explicit ratio information supplied on the API. The size information is however supplied in the response, so you can figure it out locally. We try to enforce as close to a 1:1.5 ratio for posters as possible.

I'm probably being obtuse at this point, but are you saying the API response itself has a size component? The image lookup API doesn't seem to return anything. For example, https://api.themoviedb.org/3/tv/63247/images?api_key=&language=en-US is returning the follow for me. Is there something in the API I'm missing (I'm definitely the type to search for the glasses on my head if you know what I mean). Obviously I can compute the size after actually getting the image, but I don't see a way to get the alternate posters.

{
     backdrops: [ ],
     id: 63247,
     posters: [ ]
}

That's because there's no images added with the language you are specifying. Make sure to read through this help article.

https://api.themoviedb.org/3/tv/63247/images?api_key=&language=en-US&include_image_language=en,null

Which will return a response like so:

{
  "backdrops": [
    {
      "aspect_ratio": 1.77777777777778,
      "file_path": "/6ROakWtfAXIZCFzBsBE4Cr70urA.jpg",
      "height": 1485,
      "iso_639_1": null,
      "vote_average": 5.442,
      "vote_count": 7,
      "width": 2640
    },
    {
      "aspect_ratio": 1.77777777777778,
      "file_path": "/8GABbITnzhGuE2RAfWWK0BVdbNo.jpg",
      "height": 2160,
      "iso_639_1": null,
      "vote_average": 5.326,
      "vote_count": 7,
      "width": 3840
    },
    {
      "aspect_ratio": 1.77777777777778,
      "file_path": "/45rk1PQjiTvEPzi0yBfYl0bdzz3.jpg",
      "height": 1620,
      "iso_639_1": null,
      "vote_average": 5.306,
      "vote_count": 7,
      "width": 2880
    },
    ...
  ]
}

And you'll actually see, I was wrong (I completely forgot about this) there is an aspect ratio field.

Sheesh. Right in front of my nose! Thank you for helping!

No problem!