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' For complete examples and data files, please go to https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-.NET
Using doc As CellsDocument = Document.Load(Of CellsDocument)(Utilities.MapSourceFilePath(FilePath))
    ' Get the size of content area
    Console.WriteLine(doc.Worksheets(0).ContentAreaHeight)
    Console.WriteLine(doc.Worksheets(0).ContentAreaWidth)

    ' Get the size of particular cell
    Console.WriteLine(doc.Worksheets(0).GetColumnWidth(0))
    Console.WriteLine(doc.Worksheets(0).GetRowHeight(0))
End Using