diff --git a/Source/OpenTK/Math/Vector2.cs b/Source/OpenTK/Math/Vector2.cs
index 59f888f1..0af1ce9f 100644
--- a/Source/OpenTK/Math/Vector2.cs
+++ b/Source/OpenTK/Math/Vector2.cs
@@ -35,10 +35,26 @@ namespace OpenTK.Math
         /// </summary>
         public float Y;
 
+        /// <summary>
+        /// Defines a unit-length Vector2 that points towards the X-axis.
+        /// </summary>
 		public static Vector2 UnitX = new Vector2(1, 0);
+
+        /// <summary>
+        /// Defines a unit-length Vector2 that points towards the Y-axis.
+        /// </summary>
 		public static Vector2 UnitY = new Vector2(0, 1);
+
+        /// <summary>
+        /// Defines a zero-length Vector2.
+        /// </summary>
 		public static Vector2 Zero = new Vector2(0, 0);
 
+        /// <summary>
+        /// Defines the size of the Vector2 struct in bytes.
+        /// </summary>
+        public static readonly int SizeInBytes = Marshal.SizeOf(new Vector2());
+
         #endregion
 
         #region Constructors
diff --git a/Source/OpenTK/Math/Vector3.cs b/Source/OpenTK/Math/Vector3.cs
index 47fedf3e..d62b2835 100644
--- a/Source/OpenTK/Math/Vector3.cs
+++ b/Source/OpenTK/Math/Vector3.cs
@@ -37,11 +37,29 @@ namespace OpenTK.Math
 		/// </summary>
 		public float Z;
 
+        /// <summary>
+        /// Defines a unit-length Vector3 that points towards the X-axis.
+        /// </summary>
         public static readonly Vector3 UnitX = new Vector3(1, 0, 0);
+
+        /// <summary>
+        /// Defines a unit-length Vector3 that points towards the Y-axis.
+        /// </summary>
         public static readonly Vector3 UnitY = new Vector3(0, 1, 0);
+
+        /// <summary>
+        /// /// Defines a unit-length Vector3 that points towards the Z-axis.
+        /// </summary>
         public static readonly Vector3 UnitZ = new Vector3(0, 0, 1);
+
+        /// <summary>
+        /// Defines a zero-length Vector3.
+        /// </summary>
         public static readonly Vector3 Zero = new Vector3(0, 0, 0);
 
+        /// <summary>
+        /// Defines the size of the Vector3 struct in bytes.
+        /// </summary>
         public static readonly int SizeInBytes = Marshal.SizeOf(new Vector3());
 
         #endregion
diff --git a/Source/OpenTK/Math/Vector4.cs b/Source/OpenTK/Math/Vector4.cs
index 086236b3..2227c8ba 100644
--- a/Source/OpenTK/Math/Vector4.cs
+++ b/Source/OpenTK/Math/Vector4.cs
@@ -42,12 +42,36 @@ namespace OpenTK.Math
         /// </summary>
         public float W;
 
+        /// <summary>
+        /// Defines a unit-length Vector4 that points towards the X-axis.
+        /// </summary>
 		public static Vector4 UnitX = new Vector4(1, 0, 0, 0);
-		public static Vector4 UnitY = new Vector4(0, 1, 0, 0);
+
+        /// <summary>
+        /// Defines a unit-length Vector4 that points towards the Y-axis.
+        /// </summary>
+        public static Vector4 UnitY = new Vector4(0, 1, 0, 0);
+
+        /// <summary>
+        /// Defines a unit-length Vector4 that points towards the Z-axis.
+        /// </summary>
 		public static Vector4 UnitZ = new Vector4(0, 0, 1, 0);
+
+        /// <summary>
+        /// Defines a unit-length Vector4 that points towards the W-axis.
+        /// </summary>
 		public static Vector4 UnitW = new Vector4(0, 0, 0, 1);
+
+        /// <summary>
+        /// Defines a zero-length Vector4.
+        /// </summary>
 		public static Vector4 Zero = new Vector4(0, 0, 0, 0);
 
+        /// <summary>
+        /// Defines the size of the Vector4 struct in bytes.
+        /// </summary>
+        public static readonly int SizeInBytes = Marshal.SizeOf(new Vector4());
+
         #endregion
 
         #region Constructors