Why wartime corvettes stayed small

How large would Royal Navy corvettes be if destroyers and sloops became much larger?

They would still be about 1,000 tons because the design starts with the minimum escort equipment and the smallest hull merchant yards can build quickly.

The Royal Navy already knew from its sloops which escort systems were essential, then sought the smallest merchant-standard hull able to carry them. Keeping the Flower-type concept near 1,000 tons opened construction to many more civilian yards and accelerated output. Corvette size is therefore a mobilization decision as much as a naval architecture decision.