They did, these are the two new ones -- Lizzy & Wales -- side by side:
The Lizzies are bigger than US America class assault carriers, but roughly 2/3 the displacement of a Ford, 80% the length & speed, about the same width.
They don't have catapults or unlimited range.
Here is Lizzy with Lightnings & Merlins onboard:
Seeing them next to the building provides the perspective necessary to realize just how big those carriers actually are. Great picture. 8>)
I think you don’t know what side by side is