そんだけ

that much; as much; to that extent; only that; that alone; no more than that

adverb adj-no

Example sentences

そんだけ眠（ねむ）そうな顔（かお）してれば、誰（だれ）でも分（わ）かると思（おも）うけど。

If you're looking that sleepy I think anybody could tell.