economy-size

or e·con·o·my-sized

[ ih-kon-uh-mee-sahyz ]
/ ɪˈkɒn ə miˌsaɪz /

adjective

larger in size and costing less per unit of measurement than a smaller size: an economy-size box of soap flakes.
smaller in size and costing less: economy-size cars.

Origin of economy-size

First recorded in 1945–50