Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
Note that the --format=berkeley option, which could be abbreviated as -B, is in fact the default for arm-none-eabi-size, so it could be omitted...
The -A (--format=sysv) gives more detailed information, but it will use about ten lines...
Bernard