diff --git a/web/sections/FontSizesTab.tsx b/web/sections/FontSizesTab.tsx
index d048109..4d3e8a8 100644
--- a/web/sections/FontSizesTab.tsx
+++ b/web/sections/FontSizesTab.tsx
@@ -1,4 +1,5 @@
 import { useDevice } from '../DeviceToggle';
+import { ROLES } from './roles';
 
 /**
  * How big each role is, at the width being edited.
@@ -20,14 +21,6 @@ export type FontSizes = Partial<Record<'title' | 'body' | 'sub' | 'display', Par
 
 const BREAKPOINT = { desktop: 'lg', tablet: 'md', mobile: 'base' } as const;
 
-/** The order they are read in: biggest first, which is how a type scale is judged. */
-const ROLES = [
-  { key: 'display' as const, label: 'Display' },
-  { key: 'title' as const, label: 'Headings' },
-  { key: 'body' as const, label: 'Body' },
-  { key: 'sub' as const, label: 'Menu' },
-];
-
 const inherited = (
   steps: Partial<Record<'base' | 'md' | 'lg', string>> | undefined,
   key: 'base' | 'md' | 'lg',
@@ -69,16 +62,16 @@ export const FontSizesTab = ({
   return (
     <div className="grid grid-cols-2 gap-3">
       {ROLES.map((role) => {
-        const current = sizes[role.key];
+        const current = sizes[role.size];
         const own = current?.[key];
         const from = inherited(current, key);
 
         return (
-          <div key={role.key} className="flex flex-col gap-1">
+          <div key={role.size} className="flex flex-col gap-1">
             <label className="text-xs">{role.label}</label>
             <select
               value={own ?? ''}
-              onChange={(event) => set(role.key, event.currentTarget.value)}
+              onChange={(event) => set(role.size, event.currentTarget.value)}
               className="h-8 rounded-md border border-input bg-transparent px-2 text-xs"
             >
               {/* Mobile is the smallest, so there is nothing below it to inherit from — and nothing
diff --git a/web/sections/LayoutPanel.tsx b/web/sections/LayoutPanel.tsx
index 94443e0..dfe5ad9 100644
--- a/web/sections/LayoutPanel.tsx
+++ b/web/sections/LayoutPanel.tsx
@@ -11,6 +11,7 @@ import { useEditorSlot } from '../useEditorSlot';
 import { type LayoutBand } from './PaddingTab';
 import { SpacingTab } from './SpacingTab';
 import { FontSizesTab, type FontSizes } from './FontSizesTab';
+import { ROLES } from './roles';
 
 /**
  * The shell every page renders inside: the menu, the footer, the colours and the typefaces.
@@ -76,14 +77,6 @@ type Layout = {
   font_defaults: Record<string, string>;
 };
 
-/** The four roles styles.css declares. A template asks for a role; this decides which face plays it. */
-const ROLES = [
-  { key: 'font_title' as const, label: 'Headings' },
-  { key: 'font_body' as const, label: 'Body' },
-  { key: 'font_sub' as const, label: 'Menu' },
-  { key: 'font_display' as const, label: 'Display' },
-];
-
 /**
  * The draft, as the CSS custom properties the page reads.
  *
@@ -362,18 +355,18 @@ export const LayoutPanel = () => {
 
           */}
           <div className="grid grid-cols-2 gap-3">
-            {ROLES.map(({ key, label }) => (
-              <div key={key} className="flex flex-col gap-1">
+            {ROLES.map(({ font, label }) => (
+              <div key={font} className="flex flex-col gap-1">
                 <label className="text-xs">{label}</label>
                 <select
-                  value={draft[key] ?? ''}
-                  onChange={(event) => patch({ [key]: event.currentTarget.value || null } as Partial<Layout>)}
+                  value={draft[font] ?? ''}
+                  onChange={(event) => patch({ [font]: event.currentTarget.value || null } as Partial<Layout>)}
                   className="h-8 rounded-md border border-input bg-transparent px-2 text-xs"
                 >
                   {/* Not "Default" — the face the stylesheet actually uses, named. Choosing it puts
                       things back rather than setting something new, and now you can see what back is. */}
                   <option value="">
-                    {draft.font_defaults[key] ? `${draft.font_defaults[key]} (site default)` : 'Default'}
+                    {draft.font_defaults[font] ? `${draft.font_defaults[font]} (site default)` : 'Default'}
                   </option>
                   {draft.fonts.map((font) => (
                     <option key={font} value={font}>
diff --git a/web/sections/roles.ts b/web/sections/roles.ts
new file mode 100644
index 0000000..18e44d2
--- /dev/null
+++ b/web/sections/roles.ts
@@ -0,0 +1,21 @@
+/**
+ * The four type roles, named and ordered once.
+ *
+ * ── One list, two sections ──
+ *
+ * Fonts picks the FACE for a role and Font Sizes picks its SIZE. They are the same four things, so a
+ * reader moving between the two sections is entitled to find them in the same order under the same
+ * names — and that only holds if there is one list.
+ *
+ * ── The names are the site's, not the stylesheet's ──
+ *
+ * `font_display` is the largest statements and `font_title` is a section heading, which is the reverse
+ * of what those two words suggest. So the labels say Titles and Headings, in the order somebody reads
+ * a page: the menu above it, the title, the headings under that, the words.
+ */
+export const ROLES = [
+  { size: 'sub' as const, font: 'font_sub' as const, label: 'Menu' },
+  { size: 'display' as const, font: 'font_display' as const, label: 'Titles' },
+  { size: 'title' as const, font: 'font_title' as const, label: 'Headings' },
+  { size: 'body' as const, font: 'font_body' as const, label: 'Body' },
+];