diff --git a/Ooui.Forms/Exports.cs b/Ooui.Forms/Exports.cs
index c823d1b..5388bab 100644
--- a/Ooui.Forms/Exports.cs
+++ b/Ooui.Forms/Exports.cs
@@ -11,6 +11,7 @@ using Xamarin.Forms.Internals;
 [assembly: ExportRenderer (typeof (DatePicker), typeof (DatePickerRenderer))]
 [assembly: ExportRenderer (typeof (Editor), typeof (EditorRenderer))]
 [assembly: ExportRenderer (typeof (Entry), typeof (EntryRenderer))]
+[assembly: ExportRenderer (typeof (Frame), typeof (FrameRenderer))]
 [assembly: ExportRenderer (typeof (Label), typeof (LabelRenderer))]
 [assembly: ExportRenderer (typeof (ProgressBar), typeof (ProgressBarRenderer))]
 
diff --git a/Ooui.Forms/Renderers/FrameRenderer.cs b/Ooui.Forms/Renderers/FrameRenderer.cs
new file mode 100644
index 0000000..752f534
--- /dev/null
+++ b/Ooui.Forms/Renderers/FrameRenderer.cs
@@ -0,0 +1,64 @@
+using System;
+using System.ComponentModel;
+using Xamarin.Forms;
+using Ooui.Forms.Extensions;
+
+namespace Ooui.Forms.Renderers
+{
+    public class FrameRenderer : VisualElementRenderer<Frame>
+    {
+        protected override void OnElementChanged (ElementChangedEventArgs<Frame> e)
+        {
+            base.OnElementChanged (e);
+
+            if (e.NewElement != null)
+                SetupLayer ();
+        }
+
+        protected override void OnElementPropertyChanged (object sender, PropertyChangedEventArgs e)
+        {
+            base.OnElementPropertyChanged (sender, e);
+
+            if (e.PropertyName == VisualElement.BackgroundColorProperty.PropertyName ||
+                e.PropertyName == Xamarin.Forms.Frame.OutlineColorProperty.PropertyName ||
+                e.PropertyName == Xamarin.Forms.Frame.HasShadowProperty.PropertyName ||
+                e.PropertyName == Xamarin.Forms.Frame.CornerRadiusProperty.PropertyName)
+                SetupLayer ();
+        }
+
+        void SetupLayer ()
+        {
+            float cornerRadius = Element.CornerRadius;
+
+            if (cornerRadius == -1f)
+                cornerRadius = 5f; // default corner radius
+
+            var Layer = this.Style;
+
+            Layer.BorderRadius = cornerRadius;
+
+            if (Element.BackgroundColor == Xamarin.Forms.Color.Default)
+                Layer.BackgroundColor = "white";
+            else
+                Layer.BackgroundColor = Element.BackgroundColor.ToOouiColor ();
+
+            if (Element.HasShadow) {
+                //Layer.ShadowRadius = 5;
+                //Layer.ShadowColor = "black";
+                //Layer.ShadowOpacity = 0.8f;
+                //Layer.ShadowOffset = new SizeF ();
+            }
+            else {
+                //Layer.ShadowOpacity = 0;
+            }
+
+            if (Element.OutlineColor == Xamarin.Forms.Color.Default)
+                Layer.BorderColor = Colors.Clear;
+            else {
+                Layer.BorderColor = Element.OutlineColor.ToOouiColor ();
+                Layer.BorderWidth = 1;
+                Layer.BorderStyle = "solid";
+            }
+        }
+    }
+}
diff --git a/Ooui/Style.cs b/Ooui/Style.cs
index 06b6149..4163f75 100644
--- a/Ooui/Style.cs
+++ b/Ooui/Style.cs
@@ -93,38 +93,38 @@ namespace Ooui
 
         public Value BorderTopWidth {
             get => this["border-top-width"];
-            set => this["border-top-width"] = value;
+            set => this["border-top-width"] = AddNumberUnits (value, "px");
         }
 
         public Value BorderRightWidth {
             get => this["border-right-width"];
-            set => this["border-right-width"] = value;
+            set => this["border-right-width"] = AddNumberUnits (value, "px");
         }
 
         public Value BorderBottomWidth {
             get => this["border-bottom-width"];
-            set => this["border-bottom-width"] = value;
+            set => this["border-bottom-width"] = AddNumberUnits (value, "px");
         }
 
         public Value BorderLeftWidth {
             get => this["border-left-width"];
-            set => this["border-left-width"] = value;
+            set => this["border-left-width"] = AddNumberUnits (value, "px");
         }
 
         public Value BorderRadius {
             get => this["border-radius"];
             set {
-                this["border-radius"] = value;
+                this["border-radius"] = AddNumberUnits (value, "px");
             }
         }
 
         public Value BorderWidth {
             get => this["border-top-width"];
             set {
-                this["border-top-width"] = value;
-                this["border-right-width"] = value;
-                this["border-bottom-width"] = value;
-                this["border-left-width"] = value;
+                this["border-top-width"] = AddNumberUnits (value, "px");
+                this["border-right-width"] = AddNumberUnits (value, "px");
+                this["border-bottom-width"] = AddNumberUnits (value, "px");
+                this["border-left-width"] = AddNumberUnits (value, "px");
             }
         }
 
@@ -403,6 +403,8 @@ namespace Ooui
 
         static string AddNumberUnits (object val, string units)
         {
+            if (val == null)
+                return null;
             if (val is string s)
                 return s;
             if (val is IConvertible c)