I made a mistake I have electret mic not ceramic. The 10mm mic has very good sound and many times louder than the 5mm mic. I should probably throw the 5mm mics in the trash they are a waste of time.
You cannot go just on the physical size.
Different makes and types can have vastly different sensitivities and characteristics.
I have some ebay ones that give next to no output, and some bought from such as Farnell that give a very high output, in comparison.
You do not need a capacitor in series with pin 3 on the LM386 because it already has a resistor to ground in it.
If you connect left and right 32 ohm earphones in parallel to make 16 ohms then the power from the LM386 will damage them and your hearing.
With a 12V supply, an LM386 output into 16 ohms is shown in its datasheet as 10Vp-p which is 0.78W RMS so each earphone gets 0.39W. But 0.1W is extremely loud and is damaging your hearing.
The 100uF capacitor value is too low since it cuts 100Hz and all lower frequencies.
Why do you have an amplified microphone and earphones?