diff --git a/size.go b/size.go
index 15b0c75..ef69fa7 100644
--- a/size.go
+++ b/size.go
@@ -12,11 +12,17 @@ func (tk *guiWidget) Size() (int, int) {
 		return 0, 0
 	}
 
+	// don't count hidden widgets in size calculations
+	if tk.hidden {
+		return 0, 0
+	}
+
 	switch tk.WidgetType {
 	case widget.Window:
 		var maxH int = 0
 		var maxW int = 0
 		for _, child := range tk.children {
+			if tk.hidden { continue }
 			sizeW, sizeH := child.Size()
 			maxW += sizeW
 			if sizeH > maxH {
@@ -35,6 +41,7 @@ func (tk *guiWidget) Size() (int, int) {
 		maxH := tk.gocuiSize.Height()
 
 		for _, child := range tk.children {
+			if tk.hidden { continue }
 			sizeW, sizeH := child.Size()
 
 			// increment straight down
@@ -52,9 +59,11 @@ func (tk *guiWidget) Size() (int, int) {
 }
 
 func (w *guiWidget) sizeGrid() (int, int) {
+	if w.hidden { return 0, 0 }
 
 	// first compute the max sizes of the rows and columns
 	for _, child := range w.children {
+		if w.hidden { continue }
 		sizeW, sizeH := child.Size()
 
 		// set the child's realWidth, and grid offset
@@ -78,14 +87,16 @@ func (w *guiWidget) sizeGrid() (int, int) {
 	return totalW + me.GridPadW, totalH
 }
 
-func (tk *guiWidget) sizeBox() (int, int) {
-	if tk.WidgetType != widget.Box {
+func (w *guiWidget) sizeBox() (int, int) {
+	if w.WidgetType != widget.Box {
 		return 0, 0
 	}
+	if w.hidden { return 0, 0 }
 	var maxW int = 0
 	var maxH int = 0
 
-	for _, child := range tk.children {
+	for _, child := range w.children {
+		if w.hidden {continue}
 		sizeW, sizeH := child.Size()
 		if child.direction == widget.Horizontal {
 			maxW += sizeW