How Do I know the photo sizes ?

[#1]

Before I place an order on ther stock photo websites.. they told me what kind of sizes of the photos I can download.  But I can not see these informaton on adobe stock?

like this one

https://stock.adobe.com/images/set-of-round-gradient-mandala-on-white-isolated-background-vector-hip...

[#2]

Before I place an order on ther stock photo websites.. they told me what kind of sizes of the photos I can download.  But I can not see these informaton on adobe stock?

like this one

https://stock.adobe.com/images/set-of-round-gradient-mandala-on-white-isolated-background-vector-hip...

[#3]

The file type is AI / EPS, i.e. vector. So size doesn't matter because you can scale without losing quality.

[#4]

Because this is not a photo, not a JPEG, you need to be sure you have suitable software for working with AI/EPS files. Let us know if you aren't sure or would like help with that.