There is no "size" label that I can see. I have found no way to view an image size in Adobe stock.
Branching to a new discussion,
You can check the pixel info under the "Size" label of every image on the Adobe Stock website as shown in the screenshot below:
Feel free to update this thread in case of any additional questions.
Thanks for reply. Unfortunately though, too many contributors don't include the file sizes. That's why I couldn't see them.
Are you referring to a vector file? If not, is there any specific file ID which you can share with us so that we can check and let you know.