<!--
{
  "availability" : [
    "iOS: 16.0.0 -",
    "iPadOS: 16.0.0 -",
    "macCatalyst: 16.0.0 -",
    "macOS: 13.0.0 -",
    "tvOS: 16.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 9.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Charts",
  "identifier" : "/documentation/Charts/MarkDimension",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "Swift Charts"
    ],
    "preciseIdentifier" : "s:6Charts13MarkDimensionV"
  },
  "title" : "MarkDimension"
}
-->

# MarkDimension

An individual dimension representing a mark’s width or height.

```
@frozen struct MarkDimension
```

## Topics

### Supporting types

[`struct MarkDimensions`](/documentation/Charts/MarkDimensions)

### Initializers

[`init(floatLiteral: Double)`](/documentation/Charts/MarkDimension/init(floatLiteral:))

Creates a constant width or height from a floating point value.

[`init(integerLiteral: Int)`](/documentation/Charts/MarkDimension/init(integerLiteral:))

Creates a constant width or height from an integer.

### Type Properties

[`static var automatic: MarkDimension`](/documentation/Charts/MarkDimension/automatic)

A dimension that determines its value automatically.

### Type Methods

[`static func fixed(CGFloat) -> MarkDimension`](/documentation/Charts/MarkDimension/fixed(_:))

A constant dimension.

[`static func inset(CGFloat) -> MarkDimension`](/documentation/Charts/MarkDimension/inset(_:))

A dimension that’s the step size minus the specified inset value on
each side.

[`static func ratio(CGFloat) -> MarkDimension`](/documentation/Charts/MarkDimension/ratio(_:))

A dimension that’s proportional to the scale step size,
using the specified ratio.

## Relationships

### Conforms To

[`ExpressibleByIntegerLiteral`](/documentation/Swift/ExpressibleByIntegerLiteral)

[`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable)

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Escapable`](/documentation/Swift/Escapable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`ExpressibleByFloatLiteral`](/documentation/Swift/ExpressibleByFloatLiteral)

[`Copyable`](/documentation/Swift/Copyable)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)