The dimensions are as follows:

3 part folding ladder

Floor to ceiling height range of 2180 mm to 2850 mm

Standard hatchbox depth = 240 mm (other depths are available)

From 1200 mm long x 570 mm wide through to 1500 mm long x 800 mm wide    

2 part sliding ladder

Floor to ceiling height range of 2150 mm to 2900 mm for the 1100 mm x 600 mm hatchbox and 2150 mm to 3200 mm for the 1500 mm x 800 mm

Standard hatchbox depth = 240 mm (other depths are available)

From 1100 mm long x 600 mm wide through to 1500 mm long x 800 mm wide