measured 76.28mm² chip area (7,37mm x 10,35mm)
9.83mm² for the interface (GMI) and other general chip parts
each 32.10mm² for a Core Complex (CCX) with 4 CPU cores each
a CCX contains 16.99mm² of Level3 cache (16 MB total for 4 CPU cores)
a CCX contains 4x 0.8mm² of Level2 cache (512KB per CPU core)
a CCX contains 4x 2.87mm² for the CPU cores themselves
Source: Locuza @ YouTube
AMD official indication: 31.3mm² per CCX and 74mm² for the whole chip