How to force ls terminal command to show results in Bytes while I have set the default to ls -h in bash profile?

Is there other command I can use to get file size?

Use one of the following:

wc -c file

-c prints the byte count.

\ls -ln file

\ escapes the ls alias.

Linux:

stat --format="%s" file

OS X:

stat -f "%z bytes" file

See Stack Overflow question Portable way to get file size (in bytes) in shell? for other alternatives.