ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / StyleItem Class / PatchWidth Property
Example Version

PatchWidth Property (StyleItem)
Gets or sets the width of preview image for the style item.
Syntax
public int PatchWidth {get; set;}
Example
Create a Swatch for a given symbol
//Note: call within QueuedTask.Run()
CIMSymbol symbol = SymbolFactory.Instance.ConstructPointSymbol(ColorFactory.Instance.GreenRGB, 1.0, SimpleMarkerStyle.Circle);
  //You can generate a swatch for a text symbols also.
  var si = new SymbolStyleItem()
  {
      Symbol = symbol,
      PatchHeight = 64,
      PatchWidth = 64
  };
  return si.PreviewImage;
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also