This is a combined 30mph and speed camera warning sign. 

The size is circa 72cm high by 41cm wide (28" high by 16" wide). It's made of aluminium, the sign coating is reflective and it comes with post mounting brackets and jubilee clip type adjustable bands so anyone can fit it in minutes. 

These are made to UK local authority specifications in terms of design, size, colours, etc., so if you need a sign to slow traffic down where you live, and the local council is disinclined to fit one, nobody will notice this magically appearing on an existing lamp post or telegraph pole overnight.

Delivery is by Royal Mail Tracked.