I'm trying to find files with size larger than "x" , ex: 32 bytes
But what I found in ls --help was only ls -S , that just sort by size  and not satisfied my demand
I'm new to Linux , I've tried Google but I don't know what keywords should I use to find answer , could somebody give me advice , thank you !
Try to use the power of find utility.
Find files greater than 32 bytes:
find -size +32c
Of course you could also ask for files smaller than 32 bytes:
find -size -32c
And files with exact 32 bytes:
find -size 32c
For files with 32 bytes or more:
find -size 32c -o -size +32c
Or not smaller than 32 bytes (the same as above, but written another way):
find ! -size -32c
And files between 32 and 64 bytes:
find -size +32c -size -64c
And you can also apply other common suffixes:
find -size +32k -size -64M
Try this:
find . -size +32c -ls
You can change 32 for the size you want. In this case, I used your example.
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