SUMMARY
A user can choose to prefer SI unit prefixes for their binary numbers by adding the following to ~/.config/kdeglobals:

    [Locale]
    BinaryUnitDialect=2

but Dolphini does not always respect this choice. Instead it continues to use IEC units in the main panel (and potentially other places?). It DOES respect this for the properties dialogue and bottom panel showing disk space.

STEPS TO REPRODUCE
1. Add the aforementioned lines to the kdeglobals file
2. Open Dolphin
3. Enable Details View Mode
4. Look at the size of a file shown in the list

OBSERVED RESULT
Size is given like "19.1 MiB"

EXPECTED RESULT
Size is given like "20.1 MB" (it's a 20,056,162 byte file)

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20230707
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.10
Kernel Version: 6.3.9-1-default (64-bit)
Graphics Platform: X11

ADDITIONAL INFORMATION