中ちゅうくらい

noun which may take the genitive case particle 'no', na-adjective, noun

medium; middle; average

Describes size, degree, or level that is neither high nor low, big nor small. Often used with の to modify nouns, or as a な-adjective.

• 中ちゅうくらいのサイズをください。

  Please give me a medium size.

• 彼かれの成せい績せきは中ちゅうくらいだ。

  His grades are about average.