Three PVC double-glazed windows, all pictured on their sides:
Window 1 (photographed against banisters) - small fixed top panel (which has been removed, but could be refitted) and large opening bottom panel. 138cm x 91cm. In need of a new handle (less than £5 according to a quick search and very easy to fit) if you want to use it as a full window. Alternatively, the two glass panels are 33cm x 80cm and 69cm x 80cm.
Window 2 (photographed in front of radiator) - single opening panel. 119 x 84cm.
Window 3 (photographed in front of doorway) - single opening panel. 119 x 77cm.