Why does this happen?
 

I am trying to post a picture of my quilt. I click the image icon and download the image from my computer. A postage stamp size image is what shows in my post. The original size of the images are not thumbnails. Why can't I get a larger picture to display?

is it still small after you have posted?
sometimes mine are small while i create the post, but they show in the proper size once i complete the posting process.

They are small after posting.

Could you "copy" the properties of the picture you tried to post and "paste" them here? If you need help with that, ask.

I got it to work. I had mm instead of inches.
I posted pictures of my Underground Railroad quilt blocks.