FittedBox is a very useful widget that scales and positions its child within itself according to fit and alignment .
Read moreWhat is a Flutter box?
In Flutter, widgets are rendered by their underlying RenderBox objects . Render boxes are given constraints by their parent, and size themselves within those constraints. Constraints consist of minimum and maximum widths and heights; sizes consist of a specific width and height.
Read moreWhat is size box in Flutter?
SizedBox is a built-in widget in flutter SDK. It is a simple box with a specified size. It can be used to set size constraints to the child widget, put an empty SizedBox between the two widgets to get some space in between, or something else. It is somewhat similar to a Container widget with fewer properties.
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