This sign is displayed on the back of every seat on Easyjet planes (observation made in xxDATE HERE).

The information it provides is pretty much straightforward and the pictograms are too extremely clear.

The only problem is that the scale of the drawing is way too optimistic and hence the whole graphic misleading. The amount of legroom between the seat rows is exaggerated; the scale of human body parts and luggage is unrealistic. Here below a slightly more accurate rendering of what happens when you try to follow their suggestion about hand luggage storage.

Looking forward to seeing this kind of graphic honesty on board soon.