feat: Add option to give customized fixed height / width / font size

Is your feature request related to a problem? Please describe.

This update introduces the ability to customize the fixed height, width, and font size for various elements. Users can now define specific dimensions and font sizes according to their requirements, providing more flexibility in styling and layout management. This enhancement ensures that users can easily fine-tune the presentation of components, making the UI adaptable to different screen sizes, content, and design preferences.