これだけ

adverb, noun which may take the genitive case particle 'no'

this much; to this extent

Refers to the amount, degree, or extent of something, often implying it is limited or just this much. Can be used adverbially or with の to modify a noun.

• これだけあれば十じゅう分ぶんです。

  This much is enough.

• これだけの量りょうなら一人ひとりで食たべられる。

  If it's only this amount, I can eat it by myself.