block-size

The block-size CSS property defines the size of an element’s block along the block axis. If the writing-mode is horizontal, it corresponds to the height; if the writing mode is vertical, it corresponds to the width. A related property is inline-size, which defines the other dimension of the element.

Values: The block-size property takes the same values as the width and height properties.

Syntax example: block-size: 300px;