Paramātmā

kecit sva-dehāntar-hṛdayāvakāśe 

prādeśa-mātraḿ puruṣaḿ vasantam 

catur-bhujaḿ kañja-rathāńga-śańkha- 

gadā-dharaḿ dhāraṇayā smaranti 

(Srimad Bhagavatam 2.2.8) 

Translation:- Others conceive of the Personality of Godhead residing within the body in the region of the heart and measuring only eight inches, with four hands carrying a lotus, a wheel of a chariot, a conch shell, and a club respectively. 

The all-pervading personality of Godhead resides as Paramātmā in the heart of each and every living entity. The measurement of the localized Personality of Godhead is estimated to expand from the ring finger to the end of the thumb, more or less eight inches.