diff --git a/static/css/daw.css b/static/css/daw.css
index 351b2a12..5f8cccf5 100644
--- a/static/css/daw.css
+++ b/static/css/daw.css
@@ -3260,7 +3260,9 @@ input, textarea { font-family: inherit; }
 }
 .bg-check input[type="checkbox"] { accent-color: var(--accent); cursor: pointer; }
 .bg-meter input[type="number"] {
-  width: 4ch; padding: 2px 4px;
+  /* Wide enough for two digits (1-32) beside the native spin button, which
+     keeps ~15px of the box even while it is not hovered (#803). */
+  width: 44px; padding: 2px 2px;
   background: var(--panel); border: 1px solid var(--border-strong);
   border-radius: 4px; color: var(--fg);
   font-family: inherit; font-size: 11px; font-weight: 600; text-align: center;
diff --git a/tests/e2e/grid-value-box.spec.mjs b/tests/e2e/grid-value-box.spec.mjs
new file mode 100644
index 00000000..ef931d0a
--- /dev/null
+++ b/tests/e2e/grid-value-box.spec.mjs
@@ -0,0 +1,75 @@
+// Grid editor value boxes (#803): every value the toolbar shows must be fully
+// readable, spinner included. The Bar box is the only value-carrying control
+// (Ripple and Snap are checkboxes), and its width was 4ch with the browser's
+// spin button taking a slice of it, so two digits were clipped.
+//
+// scrollWidth vs clientWidth cannot see this: a number input's text lives in a
+// shadow inner editor, so the input itself never reports overflow. Instead the
+// test measures the digits with the input's own computed font and compares
+// them to the room left once padding, borders and the spin button (15px in
+// Chromium, reserved even while it is invisible) are taken out.
+
+import { test, expect } from "@playwright/test";
+import { openStudio, waitForClickTrack } from "./helpers.mjs";
+
+const SPIN = 15;
+// Toolbar height per window width on unfixed big-release: the controls row
+// already wraps in the narrow wave column, so the fix must not add a row.
+const HEIGHT = { 1440: 63, 1280: 95, 1024: 127 };
+
+async function measure(page, value) {
+  const input = page.locator("#bg-barlen");
+  await input.fill(String(value));
+  await input.hover();
+  return input.evaluate((el) => {
+    const cs = getComputedStyle(el);
+    const ctx = document.createElement("canvas").getContext("2d");
+    ctx.font = `${cs.fontStyle} ${cs.fontWeight} ${cs.fontSize} ${cs.fontFamily}`;
+    const text = ctx.measureText(el.value).width;
+    const pad = parseFloat(cs.paddingLeft) + parseFloat(cs.paddingRight);
+    const room = el.clientWidth - pad;
+    return { value: el.value, width: el.getBoundingClientRect().width, clientWidth: el.clientWidth, scrollWidth: el.scrollWidth, text, room };
+  });
+}
+
+async function openGrid(page) {
+  await openStudio(page, { tauri: true });
+  await waitForClickTrack(page);
+  await page.locator("#t-metro-edit").click();
+  await expect(page.locator("#beatgrid-toolbar")).not.toHaveClass(/hidden/);
+}
+
+test.describe("grid value boxes", () => {
+  test("the Bar box shows a two-digit value in full", async ({ page }) => {
+    await openGrid(page);
+    for (const v of [4, 12, 32]) {
+      const m = await measure(page, v);
+      console.log("MEASURE", JSON.stringify(m));
+      expect.soft(m.text, `digits of ${v} fit beside the spinner`).toBeLessThanOrEqual(m.room - SPIN);
+      expect.soft(m.scrollWidth, `${v} does not scroll inside the box`).toBeLessThanOrEqual(m.clientWidth);
+    }
+  });
+
+  for (const width of [1440, 1280, 1024]) {
+    test(`toolbar does not overflow at ${width}px`, async ({ page }) => {
+      await page.setViewportSize({ width, height: 800 });
+      await openGrid(page);
+      await measure(page, 32);
+      const r = await page.locator("#beatgrid-toolbar").evaluate((el) => {
+        const box = el.getBoundingClientRect();
+        const bar = el.querySelector("#bg-barlen").getBoundingClientRect();
+        return {
+          over: el.scrollWidth - el.clientWidth,
+          docOver: document.documentElement.scrollWidth - document.documentElement.clientWidth,
+          barInside: bar.left >= box.left && bar.right <= box.right,
+          h: Math.round(box.height),
+        };
+      });
+      console.log("TOOLBAR", width, JSON.stringify(r));
+      expect(r.over).toBeLessThanOrEqual(0);
+      expect(r.barInside).toBe(true);
+      expect(r.docOver).toBeLessThanOrEqual(0);
+      expect(r.h, "toolbar height (row count) unchanged").toBe(HEIGHT[width]);
+    });
+  }
+});