Код: Выделить всё
CellProperties cellTableProperties = new CellProperties
{
Borders = new CellBorders(new Border(1)),
Padding = new CellPadding(5)
};
PdfTableLayout layout = new PdfTableLayout(new AutoHeightRowLayout(4),new FixedWidthColumnLayout(4, 50));
PdfTable table = new(layout, cellTableProperties,
new TextProperties(AddStandardFont(pdfBuilder))
{
FontSize = 8,
LineHeight = 12,
TextColor = new RGBColor(0, 0, 0)
});

Подробнее здесь: https://stackoverflow.com/questions/798 ... ders-width