diff --git a/bar_chart.go b/bar_chart.go
index d8a307e..efeb465 100644
--- a/bar_chart.go
+++ b/bar_chart.go
@@ -189,6 +189,7 @@ func (b *barChart) render(result *defaultRenderResult, seriesList SeriesList) (B
 				Radians:   radians,
 				FontColor: fontColor,
 				Offset:    series.Label.Offset,
+				FontSize:  series.Label.FontSize,
 			})
 		}
 
diff --git a/horizontal_bar_chart.go b/horizontal_bar_chart.go
index 95d9a3d..2ab4c03 100644
--- a/horizontal_bar_chart.go
+++ b/horizontal_bar_chart.go
@@ -156,6 +156,7 @@ func (h *horizontalBarChart) render(result *defaultRenderResult, seriesList Seri
 				Y:         y + barHeight>>1,
 				Offset:    series.Label.Offset,
 				FontColor: series.Label.Color,
+				FontSize:  series.Label.FontSize,
 			}
 			if series.Label.Position == PositionLeft {
 				labelValue.X = 0
diff --git a/line_chart.go b/line_chart.go
index 26f94a4..9f350bd 100644
--- a/line_chart.go
+++ b/line_chart.go
@@ -147,6 +147,8 @@ func (l *lineChart) render(result *defaultRenderResult, seriesList SeriesList) (
 				Value: item.Value,
 				X:     p.X,
 				Y:     p.Y,
+				// 字体大小
+				FontSize: series.Label.FontSize,
 			})
 		}
 		// 如果需要填充区域
diff --git a/series.go b/series.go
index c36fa8b..13c637e 100644
--- a/series.go
+++ b/series.go
@@ -83,6 +83,8 @@ type SeriesLabel struct {
 	Position string
 	// The offset of label's position
 	Offset Box
+	// The font size of label
+	FontSize float64
 }
 
 const (
diff --git a/series_label.go b/series_label.go
index f0fb2ec..10fd148 100644
--- a/series_label.go
+++ b/series_label.go
@@ -45,8 +45,10 @@ type LabelValue struct {
 	Radians float64
 	// 字体颜色
 	FontColor Color
-	Orient    string
-	Offset    Box
+	// 字体大小
+	FontSize float64
+	Orient   string
+	Offset   Box
 }
 
 type SeriesLabelPainter struct {
@@ -89,6 +91,9 @@ func (o *SeriesLabelPainter) Add(value LabelValue) {
 		FontSize:  labelFontSize,
 		Font:      o.font,
 	}
+	if value.FontSize != 0 {
+		labelStyle.FontSize = value.FontSize
+	}
 	if !value.FontColor.IsZero() {
 		label.Color = value.FontColor
 	}