Width
WIDTH is a styling option for the Range Field, available in the Range section of the Styles settings tab.
It allows adjusting the range width in pixels (px) or as a percentage of the column width. By default, it is set to 100%, so the range spans the full column width.

FAQ
It defines the width of the range slider relative to the column containing it. You can set the width in pixels or as a percentage of the column width.
The WIDTH is set to 100% by default, so the range slider spans the full width of the column.
That’s all about the width feature of the Range Field form block in the JetFormBuilder plugin for WordPress.