# `GSLayer.topHeight`

*Instance Property*

Top height from the associated master.

## Declaration

```swift
var topHeight: CGFloat { get }
```

```objc
@property (nonatomic, readonly) CGFloat topHeight;
```

```python
topHeight() -> float
```

## See Also

### Common Master Metrics

- [`GSLayer.ascender`](/Core/GlyphsCore/GSLayer/ascender) — Ascender value from the associated master.
- [`GSLayer.descender`](/Core/GlyphsCore/GSLayer/descender) — Descender value from the associated master.
- [`GSLayer.italicAngle`](/Core/GlyphsCore/GSLayer/italicAngle) — Italic angle from the associated master.
- [`GSLayer.slantHeight`](/Core/GlyphsCore/GSLayer/slantHeight) — Slant height from the associated master.