Sizing

Width

Use the width or w property to set the width of an element.

// hardcoded values
<Box width="64px" />
<Box w="4rem" />

// token values
<Box width="5" />
<Box w="5" />

Fractional width

Use can set fractional widths using the width or w property.

Values can be within the following ranges:

• Thirds: 1/3 to 2/3
• Fourths: 1/4 to 3/4
• Fifths: 1/5 to 4/5
• Sixths: 1/6 to 5/6
• Twelfths: 1/12 to 11/12

// half width
<Flex>
  <Box width="1/2" />
  <Box width="1/2" />
</Flex>

// thirds
<Flex>
  <Box width="1/3" />
  <Box width="2/3" />
</Flex>

// fourths
<Flex>
  <Box width="1/4" />
  <Box width="3/4" />
</Flex>

// fifths
<Flex>
  <Box width="1/5" />
  <Box width="4/5" />
</Flex>

// sixths
<Flex>
  <Box width="1/6" />
  <Box width="5/6" />
</Flex>

// twelfths
<Flex>
  <Box width="3/12" />
  <Box width="9/12" />
</Flex>

Viewport width

Use the modern viewport width values dvw, svw, lvw.

dvw maps to 100dvw, svw maps to 100svw, lvw maps to 100lvw.

<Box width="dvw" />
<Box w="dvw" /> // shorthand

Prop	CSS Property	Token Category
w, width	width	sizes

Max width

Use the maxWidth or maxW property to set the maximum width of an element.

// hardcoded values
<Box maxWidth="640px" />
<Box maxW="4rem" /> // shorthand

// token values
<Box maxWidth="xl" />
<Box maxW="2xl" /> // shorthand

Prop	CSS Property	Token Category
maxW, maxWidth	max-width	sizes

Min width

Use the minWidth or minW property to set the minimum width of an element.

// hardcoded values
<Box minWidth="64px" />
<Box minW="4rem" /> // shorthand

// token values
<Box minWidth="8" />
<Box minW="10" /> // shorthand

Prop	CSS Property	Token Category
w, width	width	sizing
maxW, maxWidth	max-width	sizing
minW, minWidth	min-width	sizing

Height

Use the height or h property to set the height of an element.

// hardcoded values
<Box height="40px" />
<Box h="0.4rem" /> // shorthand

// token values
<Box height="5" />
<Box h="5" /> // shorthand

Fractional height

Use can set fractional heights using the height or h property.

Values can be within the following ranges:

• Thirds: 1/3 to 2/3
• Fourths: 1/4 to 3/4
• Fifths: 1/5 to 4/5
• Sixths: 1/6 to 5/6

<Box height="1/2" />
<Box h="1/2" /> // shorthand

Relative heights

Use the modern relative height values dvh, svh, lvh.

dvh maps to 100dvh, svh maps to 100svh, lvh maps to 100lvh.

<Box height="dvh" />
<Box h="dvh" /> // shorthand

Max height

Use the maxHeight or maxH property to set the maximum height of an element.

// hardcoded values
<Box maxHeight="40px" />
<Box maxH="0.4rem" /> // shorthand

// token values
<Box maxHeight="8" />
<Box maxH="10" /> // shorthand

Min height

Use the minHeight or minH property to set the minimum height of an element.

// hardcoded values
<Box minHeight="40px" />
<Box minH="0.4rem" /> // shorthand

// token values
<Box minHeight="8" />
<Box minH="10" /> // shorthand

Prop	CSS Property	Token Category
h, height	height	sizes
maxH, maxHeight	max-height	sizes
minH, minHeight	min-height	sizes