The picture here is of it at its smallest being 1500mm long and 1040mm wide, the middle section is a fixed item and the 2 end leaves slide apart for the butterfly wing extensions to fold out.
The 2 halves of the butterfly wing extension are hinged with a Soss type hinge and pivot on a aluminum tube, the apron pieces are hinged and the one that hangs down underneath is held up with a magnetic catch.
There are two of these extensions so we have a choice of 3 table sizes the smallest as mentioned earlier being 1500mm then with one extension being 1870mm and when both butterfly wings are open 2240mm, we don't have 8 chairs but some may like to stand and admire.