# `GlyphsPathPlugin knobSizeIsSelected:`

*Instance Method*

Returns the radius of a knob.

## Declaration

```swift
func knobSizeIsSelected(_ isSelected: Bool) -> CGFloat
```

```objc
- (CGFloat) knobSizeIsSelected:(BOOL) isSelected;
```

```python
knobSizeIsSelected_(isSelected: bool) -> float
```

## Parameters

- `isSelected` — Whether to return the size of a selected knob.