Add some ring sizes

macrovision.js

@@ -82,6 +82,21 @@ math.createUnit({
         definition: "0.3333333333333333333 in",
         offset: 23,
     },
+    RingSizeNA: {
+        prefixes: "long",
+        definition: "0.0327 inches",
+        offset: 13.883792
+    },
+    RingSizeISO: {
+        prefixes: "long",
+        definition: "0.318309886 mm",
+        offset: 0
+    },
+    RingSizeIndia: {
+        prefixes: "long",
+        definition: "0.318309886 mm",
+        offset: 40
+    }
 });
 
 math.createUnit("humans", {
@@ -414,6 +429,9 @@ const unitChoices = {
         ],
         customary: ["inches", "feet", "yards", "miles", "nauticalMiles"],
         relative: [
+            "RingSizeNA",
+            "RingSizeISO",
+            "RingSizeIndia",
             "ShoeSizeEU",
             "ShoeSizeUK",
             "ShoeSizeMensUS",