How Do I Can Change The Paper Name When Print Report In Crystal Report?

See more:

C#

CrystalReports

I'm trying to print sales bill like to supermarket ,I have the crystal report and I made Paper Size to User Defined Size 4*8 but when I print report the paper name = latter and Report printing on A4 size or latter Size and i want to print report on my size , I'm using this code

SBillTableAdapter ta = new SBillTableAdapter();

DataSet1.SBillDataTable table = ta.GetData(9);

SBill CRBill = new SBill();
CRBill.SetDataSource(table.DefaultView);

CRBill.SetParameterValue(0,Convert.ToInt32 (textBox3.Text));
CRBill.SetParameterValue(1, Convert.ToInt32(textBox2.Text));
CRBill.SetParameterValue(2, Convert.ToInt32(textBox4.Content));
System.Drawing.Printing.PrintDocument printDoc = new System.Drawing.Printing.PrintDocument();
int i;
int rawKind = 0;
for (i = 0; i < printDoc.PrinterSettings.PaperSizes.Count; i++)
{
    if (printDoc.PrinterSettings.PaperSizes[i].PaperName == "User Defined Size")
    {
        rawKind = (int)GetField(printDoc.PrinterSettings.PaperSizes[i], "kind");
    }
}
CRBill.PrintOptions.PaperSize = (CrystalDecisions.Shared.PaperSize)rawKind;
CRBill.PrintToPrinter(1, true, 0, 0);

Please help me how i can change the paper name to my size?