Just put the peg on the scales and its a massive 15g. The head of the peg where it bends could be cut back quite a lot so I think maybe 4 g could be cut off. See pic, as you can see its bigger than a log burner.
This peg is the heavy duty version, can't speak for the lighter version she sells.
that looks like you've stuck it to the flue and stretched it to 6ft.