I think you get the image plus the thumbnail if you use the "Image Tool" to insert the image. On the other hand, you can just copy the image from wherever and paste it into the post. No need to use tools and no duplicate. You can resize the image after pasting, if you wish.
I did a "right click" copy image from your original post and did a "ctrl V" to paste it. I then resized it a bit by dragging the corner of the pic (It was too big).
Please see pictures below; Gen 2-3 RDL Saddle is all vinyl. Previous owner was 6', 230 and said it was comfortable for him, It didn't work for me for it's for sale $290 delivered. Backrest is $110, Paint Set is $38.00, all delivered within the lower 48.
Never assume. You see one picture of a Russell Drivers saddle. If I have a pillion A) I would show it and B) I'd probably want more money for a set (which I don't have). Sorry, and thanks for the inquiry.