diff --git a/src/glyphs/I.js b/src/glyphs/I.js
index 694b9a9..78f8272 100644
--- a/src/glyphs/I.js
+++ b/src/glyphs/I.js
@@ -1,44 +1,10 @@
-const makeGlyph = (opentype, name, unicode, cmds, adv) =>
-  new opentype.Glyph({
-    name,
-    unicode,
-    advanceWidth: adv,
-    path: cmds(new opentype.Path())
-  });
-
-export const glyphI = (opentype, adv) =>
-  makeGlyph(
-    opentype,
-    "I",
-    "I".codePointAt(0),
-    (p) => {
-      p.moveTo(270, 0);
-      p.lineTo(270, 700);
-      p.lineTo(330, 700);
-      p.lineTo(330, 0);
-      p.close();
-      return p;
-    },
-    adv
-  );
-
-export const glyphi = (opentype, adv) =>
-  makeGlyph(
-    opentype,
-    "i",
-    "i".codePointAt(0),
-    (p) => {
-      p.moveTo(270, 0);
-      p.lineTo(270, 480);
-      p.lineTo(330, 480);
-      p.lineTo(330, 0);
-      p.close();
-      p.moveTo(270, 580);
-      p.lineTo(270, 660);
-      p.lineTo(330, 660);
-      p.lineTo(330, 580);
-      p.close();
-      return p;
-    },
-    adv
-  );
+const mk=(o,n,u,d,w)=>new o.Glyph({name:n,unicode:u,advanceWidth:w,path:d(new o.Path())});
+export const glyphI=(o,w)=>mk(o,"I",73,p=>{
+  p.moveTo(260,0);p.lineTo(260,700);p.lineTo(340,700);p.lineTo(340,0);p.close();
+  return p;
+},w);
+export const glyphi=(o,w)=>mk(o,"i",105,p=>{
+  p.moveTo(260,0);p.lineTo(260,480);p.lineTo(340,480);p.lineTo(340,0);p.close();
+  p.moveTo(260,600);p.lineTo(260,680);p.lineTo(340,680);p.lineTo(340,600);p.close();
+  return p;
+},w);