This 4mm band is in the classic plain shape of a domed ring that has a comfort fit interior. A comfort fit interior indicates a slightly domed interior shape.
This is a is fabricated from die struck gold and is not a casted band. Therefore it is stronger and more durable than many others and can always be easily adjusted for size without any invasive work. The addition of a mill grain edge engraving is reminiscent
of design element originating in the 1920s that has remained popular till this day.