Size according to Qur'an 22:64
His is all that the heavens and earth contain.  He is the Self-sufficient, the Glorious One.  Do you not see how He subdued to you all that is in the earth?  He has given you ships which sail the sea at His bidding.  He holds the sky from falling down; this it shall not do except by His own will.  Compassionate is Allah, and merciful to men.