ImageSize class

Contains information about image size and resolution.

To learn more, visit the Working with Images documentation article.

public class ImageSize


ImageSize(int, int)Initializes width and height to the given values in pixels. Initializes resolution to 96 dpi.
ImageSize(int, int, double, double)Initializes width, height and resolution to the given values.


HeightPixels { get; }Gets the height of the image in pixels.
HeightPoints { get; }Gets the height of the image in points. 1 point is 1/72 inch.
HorizontalResolution { get; }Gets the horizontal resolution in DPI.
VerticalResolution { get; }Gets the vertical resolution in DPI.
WidthPixels { get; }Gets the width of the image in pixels.
WidthPoints { get; }Gets the width of the image in points. 1 point is 1/72 inch.


Shows how to resize a shape with an image.

// When we insert an image using the "InsertImage" method, the builder scales the shape that displays the image so that,
// when we view the document using 100% zoom in Microsoft Word, the shape displays the image in its actual size.
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
Shape shape = builder.InsertImage(ImageDir + "Logo.jpg");

// A 400x400 image will create an ImageData object with an image size of 300x300pt.
ImageSize imageSize = shape.ImageData.ImageSize;

Assert.AreEqual(300.0d, imageSize.WidthPoints);
Assert.AreEqual(300.0d, imageSize.HeightPoints);

// If a shape's dimensions match the image data's dimensions,
// then the shape is displaying the image in its original size.
Assert.AreEqual(300.0d, shape.Width);
Assert.AreEqual(300.0d, shape.Height);

// Reduce the overall size of the shape by 50%. 
shape.Width *= 0.5;

// Scaling factors apply to both the width and the height at the same time to preserve the shape's proportions. 
Assert.AreEqual(150.0d, shape.Width);
Assert.AreEqual(150.0d, shape.Height);

// When we resize the shape, the size of the image data remains the same.
Assert.AreEqual(300.0d, imageSize.WidthPoints);
Assert.AreEqual(300.0d, imageSize.HeightPoints);

// We can reference the image data dimensions to apply a scaling based on the size of the image.
shape.Width = imageSize.WidthPoints * 1.1;

Assert.AreEqual(330.0d, shape.Width);
Assert.AreEqual(330.0d, shape.Height);

doc.Save(ArtifactsDir + "Image.ScaleImage.docx");

See Also