diff --git a/source/structs/package.d b/source/structs/package.d
index bbfc664..7c58aee 100644
--- a/source/structs/package.d
+++ b/source/structs/package.d
@@ -9,7 +9,7 @@ private
 	/++
 	 + Supported format types
 	 +/
-	enum FormatType
+	enum FORMAT_TYPE
 	{
 		INT_8, /// Signed integer 8 bit
 		INT_16, /// Signed integer 16 bit
@@ -18,7 +18,8 @@ private
 		UINT_8, /// Unsigned integer 8 bit
 		UINT_16, /// Unsigned integer 16 bit
 		UINT_32, /// Unsigned integer 32 bit
-		UINT_64 /// Unsigned integer 64 bit
+		UINT_64, /// Unsigned integer 64 bit
+		STRING /// C-String
 	}
 
 	/++
@@ -29,7 +30,40 @@ private
 		Endian endian; /// The endian to use
 		bool isArray; /// If it's an array
 		size_t arraySize; /// Array size
-		FormatType formatType; /// The formated type
+		FORMAT_TYPE formatType; /// The formated type
+
+		/++
+		 + Calculate the size of the element
+		 + Returns: Size in bytes
+		 +/
+		size_t packSize() const
+		{
+			// Base format type size
+			size_t base_size = 0;
+			final switch(this.formatType)
+			{
+				case FORMAT_TYPE.STRING:
+				case FORMAT_TYPE.INT_8:
+				case FORMAT_TYPE.UINT_8:
+					base_size = 1;
+					break;
+				case FORMAT_TYPE.INT_16:
+				case FORMAT_TYPE.UINT_16:
+					base_size = 2;
+					break;
+				case FORMAT_TYPE.INT_32:
+				case FORMAT_TYPE.UINT_32:
+					base_size = 4;
+					break;
+				case FORMAT_TYPE.INT_64:
+				case FORMAT_TYPE.UINT_64:
+					base_size = 8;
+					break;
+			}
+
+			// Add array size
+			return base_size * this.arraySize;
+		}
 	}
 
 	/++