Hi and welcome!

You can add 4 images per posting - just click on the bit
under the attachement box where it says "more attachments".
You've got the sizing right and the images blow up nicely, but if you cropped the images, we could get to see them bigger.
I'm afraid I can't actually make out what the base really looks like from the picture. I know if you're not used to looking at glass bottoms you're possibly not aware of how much information can be gained from being able to see exactly how it is finished off.
I can see the tiny "knobby" bit on the rim of the glass though - well done for capturing that!
