CSS Box Sizing

The object-position property specifies the alignment of the replaced element (like an image or video) inside its container, especially when using the object-fit property.

Values:

By default, the CSS box model adds padding and borders to the element’s width and height, often resulting in unexpected layouts. The box-sizing property allows you to control how the box model calculates element dimensions.

content-box: The default value. Width and height only apply to the content, and padding and borders are added to the final size.
border-box: The width and height include the content, padding, and borders.

Example:

.box { width: 300px; padding: 20px; border: 5px solid black; box-sizing: border-box; }

Using box-sizing: border-box ensures the box remains 300px wide, with padding and borders fitting within that width.

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CSS Box Sizing