I am saving the image in Method CRM, not through the API.
The image I am saving is 500x322 pixels. I am using the SelectXMLV2 call to then reterive the data. Here is my request data:
Table: "Contacts"
strFields: "ProfileImage,RecordID"
strWhereClause: "RecordId =1155"
In the response I get a base64 string, which when I decode, gives me an image that is 75x48 pixeles. That is the same size as the image I see in Method CRM after uploading the image, which made me think I was just getting the thumbnail image size that is used for display purposes.