What is the output format for symbol size in output of nm utility

I am using the following command

nm -B -l -r --size-sort --print-size binaryName| grep ' B '

Sample output:

00000000166140e0 0000000000aae608 B tax_dtl_buf

Here 00000000166140e0 is the size of the symbol tax_dtl_buf.

Can anyone explain how to interpret this size? I mean how to convert it to kilobyte.