If you just need to find large files, you can use find with the -size option. The next command will list all files larger than 10MiB:

find / -size +10M -ls

If you want to find files between a certain size, you can combine it with a “size lower than” search. The next command finds files between 10MiB and 12MiB:

find / -size +10M -size -12M -ls