noun which may take the genitive case particle 'no', na-adjective, noun
extra-large; king-size
Describes something larger than the standard large size, often used for clothing, food portions, or product sizes.
特大サイズのピザを注文した。
I ordered an extra-large pizza.
このTシャツは特大なので、ゆったり着られます。
This T-shirt is extra-large, so you can wear it loosely.