diff --git a/Documentation/Language.docx b/Documentation/Language.docx
index 798d0cc..367dfd2 100644
Binary files a/Documentation/Language.docx and b/Documentation/Language.docx differ
diff --git a/Documentation/Language.html b/Documentation/Language.html
index 0d5a633..0d8bf26 100644
--- a/Documentation/Language.html
+++ b/Documentation/Language.html
@@ -177,7 +177,7 @@ <h2 id="introduction">Introduction</h2>
 architectures such as x86.</p>
 <p>AssEmbly was designed and implemented in its entirety by <a
 href="https://github.com/TollyH">Tolly Hill</a>.</p>
-<p>Last revised: 2023-07-31</p>
+<p>Last revised: 2023-08-01</p>
 <h2 id="table-of-contents">Table of Contents</h2>
 <ul>
 <li><a href="#assembly-language-reference">AssEmbly Language
@@ -1784,12 +1784,14 @@ <h3 id="reading-and-writing">Reading and Writing</h3>
 JZO :READ  ; If it isn&#39;t set (i.e. it is equal to 0), jump back to READ</code></pre>
 <h3 id="other-operations">Other Operations</h3>
 <p>As well as reading and writing, there are also instructions for
-checking whether a file exists (<code>FEX</code>), and deleting a file
-(<code>DFL</code>). They both take a path in the same way
-<code>OFL</code> does, <code>DFL</code> having no effect other than
-deleting the file, and <code>FEX</code> first taking a register operand
-to store <code>1</code> in if the file exists, <code>0</code> if
-not.</p>
+checking whether a file exists (<code>FEX</code>), getting the size of a
+file (<code>FSZ</code>), and deleting a file (<code>DFL</code>). They
+all take a path in the same way <code>OFL</code> does. <code>DFL</code>
+has no effect other than deleting the file. <code>FEX</code> and
+<code>FSZ</code> first take a register operand to store their result in,
+then the path to the file as the second operand. <code>FEX</code> stores
+<code>1</code> in the register if the file exists, <code>0</code> if
+not. <code>FSZ</code> stores the total size of the file in bytes.</p>
 <h2 id="the-stack">The Stack</h2>
 <p>The stack is a section of memory most often used in conjunction with
 subroutines, explained in the subsequent section. It starts at the very
@@ -3380,6 +3382,22 @@ <h2 id="full-instruction-reference">Full Instruction Reference</h2>
 <td><code>0xE6</code></td>
 </tr>
 <tr class="odd">
+<td><code>FSZ</code></td>
+<td>Get File Size</td>
+<td>Register, Address</td>
+<td>In a register, store the byte size of the file at the path specified
+in memory starting at an address in a label</td>
+<td><code>0xE7</code></td>
+</tr>
+<tr class="even">
+<td><code>FSZ</code></td>
+<td>Get File Size</td>
+<td>Register, Pointer</td>
+<td>In a register, store the byte size of the file at the path specified
+in memory starting at an address in a register</td>
+<td><code>0xE8</code></td>
+</tr>
+<tr class="odd">
 <td><strong>Reading</strong></td>
 <td></td>
 <td></td>
diff --git a/Documentation/Language.md b/Documentation/Language.md
index 899dc8e..beeb435 100644
--- a/Documentation/Language.md
+++ b/Documentation/Language.md
@@ -6,7 +6,7 @@ AssEmbly is a mock processor architecture and assembly language written in C# an
 
 AssEmbly was designed and implemented in its entirety by [Tolly Hill](https://github.com/TollyH).
 
-Last revised: 2023-07-31
+Last revised: 2023-08-01
 
 ## Table of Contents
 
@@ -1428,7 +1428,7 @@ JZO :READ  ; If it isn't set (i.e. it is equal to 0), jump back to READ
 
 ### Other Operations
 
-As well as reading and writing, there are also instructions for checking whether a file exists (`FEX`), and deleting a file (`DFL`). They both take a path in the same way `OFL` does, `DFL` having no effect other than deleting the file, and `FEX` first taking a register operand to store `1` in if the file exists, `0` if not.
+As well as reading and writing, there are also instructions for checking whether a file exists (`FEX`), getting the size of a file (`FSZ`), and deleting a file (`DFL`). They all take a path in the same way `OFL` does. `DFL` has no effect other than deleting the file. `FEX` and `FSZ` first take a register operand to store their result in, then the path to the file as the second operand. `FEX` stores `1` in the register if the file exists, `0` if not. `FSZ` stores the total size of the file in bytes.
 
 ## The Stack
 
@@ -1786,6 +1786,8 @@ RET rfp
 | `DFL`         | Delete File                                         | Pointer                      | Delete the file at the path specified by a `0x00` terminated string in memory starting at an address in a register  | `0xE4` |
 | `FEX`         | File Exists                                         | Register, Address            | Store `1` in a register if the filepath specified in memory starting at an address in a label exists, else `0`      | `0xE5` |
 | `FEX`         | File Exists                                         | Register, Pointer            | Store `1` in a register if the filepath specified in memory starting at an address in a register exists, else `0`   | `0xE6` |
+| `FSZ`         | Get File Size                                       | Register, Address            | In a register, store the byte size of the file at the path specified in memory starting at an address in a label    | `0xE7` |
+| `FSZ`         | Get File Size                                       | Register, Pointer            | In a register, store the byte size of the file at the path specified in memory starting at an address in a register | `0xE8` |
 | **Reading**                                                                                                                                                                                                                   |||||
 | `RCC`         | Read Character from Console                         | Register                     | Read a character from the console as a byte, storing it in a register                                               | `0xF0` |
 | `RFC`         | Read Character from File                            | Register                     | Read the next character from the currently open file as a byte, storing it in a register                            | `0xF1` |
diff --git a/Documentation/Language.txt b/Documentation/Language.txt
index 8369a4e..ca27c30 100644
--- a/Documentation/Language.txt
+++ b/Documentation/Language.txt
@@ -10,7 +10,7 @@ such as x86.
 
 AssEmbly was designed and implemented in its entirety by Tolly Hill.
 
-Last revised: 2023-07-31
+Last revised: 2023-08-01
 
 Table of Contents
 
@@ -1710,10 +1710,12 @@ from the bit testing section:
 Other Operations
 
 As well as reading and writing, there are also instructions for checking
-whether a file exists (FEX), and deleting a file (DFL). They both take a
-path in the same way OFL does, DFL having no effect other than deleting
-the file, and FEX first taking a register operand to store 1 in if the
-file exists, 0 if not.
+whether a file exists (FEX), getting the size of a file (FSZ), and
+deleting a file (DFL). They all take a path in the same way OFL does.
+DFL has no effect other than deleting the file. FEX and FSZ first take a
+register operand to store their result in, then the path to the file as
+the second operand. FEX stores 1 in the register if the file exists, 0
+if not. FSZ stores the total size of the file in bytes.
 
 The Stack
 
@@ -2584,6 +2586,16 @@ Full Instruction Reference
                                  Pointer     specified in memory starting at an    
                                              address in a register exists, else 0  
 
+  FSZ           Get File Size    Register,   In a register, store the byte size of 0xE7
+                                 Address     the file at the path specified in     
+                                             memory starting at an address in a    
+                                             label                                 
+
+  FSZ           Get File Size    Register,   In a register, store the byte size of 0xE8
+                                 Pointer     the file at the path specified in     
+                                             memory starting at an address in a    
+                                             register                              
+
   Reading                                                                          
 
   RCC           Read Character   Register    Read a character from the console as  0xF0