Add US men's shoe size as a unit

macrovision.js

@@ -61,6 +61,14 @@ const tagDefs = {
     "goo": "Goo"
 }
 
+math.createUnit({
+    "ShoeSizeMensUS": {
+        prefixes: "long",
+        definition: "0.3333333333333333333 inches",
+        offset: 22
+    }
+})
+
 math.createUnit("humans", {
     definition: "5.75 feet"
 });
@@ -400,6 +408,7 @@ const unitChoices = {
             "nauticalMiles",
         ],
         "relative": [
+            "ShoeSizeMensUS",
             "stories",
             "buses",
             "marathons",