Fully closed, opening, and fully extended.  I put a 48" straightedge in there for some scale.
Our dock is not a floating, so this ladder is very handy (in the closed position) for boarding when the tide is up.
Buck Algonquin Boarding Ladder Hardware is available here: http://www.downwindmarine.com/Buck-Algonquin-Boarding-Ladder-Hardware-p-91003277.html

Measurements:
66" Open 
38.5" folded
16" wide
steps 3.5" wide 8.5" apart 5/8" thick
bottom section 27.5" long
sides 8" at widest section