diff --git a/macrovision.html b/macrovision.html
index dddc9daf..2c8b012e 100644
--- a/macrovision.html
+++ b/macrovision.html
@@ -42,9 +42,13 @@
         <div class="options-row">
           <input class="options-field-numeric" type="number" id="options-height-value" min="1" value="10">
           <select class="options-field-unit" id="options-height-unit">
-            <option>meters</option>
+            <option>millimeters</option>
+            <option>centimeters</option>
+            <option selected=true>meters</option>
             <option>kilometers</option>
+            <option>inches</option>
             <option>feet</option>
+            <option>yards</option>
             <option>miles</option>
           </select>
         </div>
diff --git a/macrovision.js b/macrovision.js
index 21a7f3ba..e62e18e1 100644
--- a/macrovision.js
+++ b/macrovision.js
@@ -14,7 +14,10 @@ let altHeld = false;
 const unitChoices = {
     length: [
         "meters",
+        "millimeters",
+        "centimeters",
         "kilometers",
+        "inches",
         "feet",
         "miles",
     ],