diff --git a/chart.go b/chart.go
index d054841adb7063005a63ab8953f1ed50fbf5d056..3321697c8bf4a352bc3eab548917b8e800884abe 100644
--- a/chart.go
+++ b/chart.go
@@ -707,7 +707,11 @@ func (opts *Chart) parseTitle() {
 // mandatory option for every chart object. This option links the chart with
 // the worksheet data that it displays.
 //
-// Fill: This set the format for the data series fill.
+// Sizes: This sets the bubble size in a data series. The 'Sizes' property is
+// optional and the default value was same with 'Values'.
+//
+// Fill: This set the format for the data series fill. The 'Fill' property is
+// optional
 //
 // Line: This sets the line format of the line chart. The 'Line' property is
 // optional and if it isn't supplied it will default style. The options that
diff --git a/chart_test.go b/chart_test.go
index 350852eb4e8e27e6517e4cbd7d008f0c3a89e779..79501eeb7f3e2326b5e415a4bfb6b7f396ed21af 100644
--- a/chart_test.go
+++ b/chart_test.go
@@ -176,14 +176,14 @@ func TestAddChart(t *testing.T) {
 	}
 	series3 := []ChartSeries{{Name: "Sheet1!$A$30", Categories: "Sheet1!$A$30:$D$37", Values: "Sheet1!$B$30:$B$37"}}
 	series4 := []ChartSeries{
-		{Name: "Sheet1!$A$30", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$30:$D$30", DataLabelPosition: ChartDataLabelsPositionAbove},
-		{Name: "Sheet1!$A$31", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$31:$D$31", DataLabelPosition: ChartDataLabelsPositionLeft},
-		{Name: "Sheet1!$A$32", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$32:$D$32", DataLabelPosition: ChartDataLabelsPositionBestFit},
-		{Name: "Sheet1!$A$33", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$33:$D$33", DataLabelPosition: ChartDataLabelsPositionCenter},
-		{Name: "Sheet1!$A$34", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$34:$D$34", DataLabelPosition: ChartDataLabelsPositionInsideBase},
-		{Name: "Sheet1!$A$35", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$35:$D$35", DataLabelPosition: ChartDataLabelsPositionInsideEnd},
-		{Name: "Sheet1!$A$36", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$36:$D$36", DataLabelPosition: ChartDataLabelsPositionOutsideEnd},
-		{Name: "Sheet1!$A$37", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$37:$D$37", DataLabelPosition: ChartDataLabelsPositionRight},
+		{Name: "Sheet1!$A$30", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$30:$D$30", Sizes: "Sheet1!$B$30:$D$30", DataLabelPosition: ChartDataLabelsPositionAbove},
+		{Name: "Sheet1!$A$31", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$31:$D$31", Sizes: "Sheet1!$B$31:$D$31", DataLabelPosition: ChartDataLabelsPositionLeft},
+		{Name: "Sheet1!$A$32", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$32:$D$32", Sizes: "Sheet1!$B$32:$D$32", DataLabelPosition: ChartDataLabelsPositionBestFit},
+		{Name: "Sheet1!$A$33", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$33:$D$33", Sizes: "Sheet1!$B$33:$D$33", DataLabelPosition: ChartDataLabelsPositionCenter},
+		{Name: "Sheet1!$A$34", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$34:$D$34", Sizes: "Sheet1!$B$34:$D$34", DataLabelPosition: ChartDataLabelsPositionInsideBase},
+		{Name: "Sheet1!$A$35", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$35:$D$35", Sizes: "Sheet1!$B$35:$D$35", DataLabelPosition: ChartDataLabelsPositionInsideEnd},
+		{Name: "Sheet1!$A$36", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$36:$D$36", Sizes: "Sheet1!$B$36:$D$36", DataLabelPosition: ChartDataLabelsPositionOutsideEnd},
+		{Name: "Sheet1!$A$37", Categories: "Sheet1!$B$29:$D$29", Values: "Sheet1!$B$37:$D$37", Sizes: "Sheet1!$B$37:$D$37", DataLabelPosition: ChartDataLabelsPositionRight},
 	}
 	format := GraphicOptions{
 		ScaleX:          defaultDrawingScale,
diff --git a/drawing.go b/drawing.go
index 43e33128f04c6ed9348e949ee48ac4dfb5776782..6003235254a639d078d698315a749516c4d7f41e 100644
--- a/drawing.go
+++ b/drawing.go
@@ -891,9 +891,13 @@ func (f *File) drawCharSeriesBubbleSize(v ChartSeries, opts *Chart) *cVal {
 	if _, ok := map[ChartType]bool{Bubble: true, Bubble3D: true}[opts.Type]; !ok {
 		return nil
 	}
+	fVal := v.Values
+	if v.Sizes != "" {
+		fVal = v.Sizes
+	}
 	return &cVal{
 		NumRef: &cNumRef{
-			F: v.Values,
+			F: fVal,
 		},
 	}
 }
diff --git a/lib.go b/lib.go
index bc564225e266214a7e0d93db97f749c35a2da1b3..db0d7d7a8047e178d492b47d42bb2e71a3f1ef48 100644
--- a/lib.go
+++ b/lib.go
@@ -431,8 +431,8 @@ func boolPtr(b bool) *bool { return &b }
 // intPtr returns a pointer to an int with the given value.
 func intPtr(i int) *int { return &i }
 
-// uintPtr returns a pointer to an int with the given value.
-func uintPtr(i uint) *uint { return &i }
+// uintPtr returns a pointer to an unsigned integer with the given value.
+func uintPtr(u uint) *uint { return &u }
 
 // float64Ptr returns a pointer to a float64 with the given value.
 func float64Ptr(f float64) *float64 { return &f }
diff --git a/xmlChart.go b/xmlChart.go
index 5e209303b6c32bc04b562d71a3b6014d247b6c6c..175fc866d252c8428142fec4c2482df9e416d5e7 100644
--- a/xmlChart.go
+++ b/xmlChart.go
@@ -607,6 +607,7 @@ type ChartSeries struct {
 	Name              string
 	Categories        string
 	Values            string
+	Sizes             string
 	Fill              Fill
 	Line              ChartLine
 	Marker            ChartMarker