Although this is listed as 32x32 tiles, the content appears to actually be authored at 16x16 and scaled up.
This is a good thing in my case, as I need 16x16 and was worried I was going to lose detail scaling down.
To the Author: I would recommend listing this as 16x16 set (and not scaling it up the files), and then let the people buying it scale up if that's what they want. As you have it, I think you will dissapoint people expecting 32x32 pixels of detail, and people requiring 16x16 (like me) might not buy it at all.