picture size in message attachment

[3gfeathers]

I occasionally ask a seller to send me a picture of their item to clarify a question but the pictures always arrive too small to make out any detail. Oddly, the sent pics are taken with the same format as the posted listing pics which I can easily see. However, when I open the attachement with the embedded viewer,  the pics are tiny. I save the pic and open it in a viewer or a pic manipulation program and I can't enlarge it without distorting the image.

Does ebay have a limitation on the size of a picture in a message attachement? Do any of you have suggestions about how I may view a larger version of the pics?

Thanks,