A sofa bed to you and me but, to some, it's really a convertible lounger.
It's Italian born and bred and has only been used twice ... and by the same person. The verdict was 'amazingly comfortable'.
The photo shows it in the 'lounger' position with its zip-on/zip-off cover; the attached link will take you to an IKEA video showing how their version of a similar sofa converts to and from a bed:
(Please note that this is NOT an IKEA sofa bed ... it's more stylish and is wider by 18cm; the link to the IKEA video is only to demonstrate how it works.)
Length is 160cm, depth 86cm and height 90cm; the colour is, apparently, dove-grey.
Buyer will need to collect.