Set post image in twitter card to large by default

Apologies if this is a stupid question but is it possible to set the images that’re displayed in a Twitter Card, in a tweet, to large (Summary with large image — Twitter Developers) by default?

Twitter is picking up the images from our posts without any issues but they’re being displayed as this size, alongside the description -

rather than this size, above the description (the same image, uploaded to Medium)

the larger images stand out more in the twitter feed.