just follow the recommended wires of your components. may minimal thickness requirements kasi ang mga yan e. pero generally speaking, the thicker wires you use, the better!
you can also try different brands with good reputation like (local) ryan audio wires or (imported) rockford fosgate, monster cable, lightning audio etc.
for the power supply
gauge 4 (positive and negative)
sa distribution blocks gauge 8
for the subs (speaker wires) gauge 16
for the seps gauge 16
remote start - gauge 14