diff --git a/client_v2/src/lib/labels/migrateV1.test.ts b/client_v2/src/lib/labels/migrateV1.test.ts
index 77eca7dd..21258fb7 100644
--- a/client_v2/src/lib/labels/migrateV1.test.ts
+++ b/client_v2/src/lib/labels/migrateV1.test.ts
@@ -140,6 +140,26 @@ describe('presetToDesign', () => {
 		expect(d.layout.columns).toBeGreaterThanOrEqual(1);
 	});
 
+	it('clamps v1 negative margins so the label matches the paper (#1149)', () => {
+		// A real preset: -20mm margins with a 1.5mm printer margin on a 62x34 roll.
+		// Carried over raw, the derived label came out 102x74.
+		const d = presetToDesign({
+			labelSettings: {
+				printSettings: {
+					paperSize: 'custom',
+					customPaperSize: { width: 62, height: 34 },
+					columns: 1,
+					rows: 1,
+					margin: { top: -20, bottom: -20, left: -20, right: -20 },
+					printerMargin: { top: 1.5, bottom: 1.5, left: 1.5, right: 1.5 }
+				}
+			}
+		});
+		expect(d.layout.margin).toEqual({ t: 0, b: 0, l: 0, r: 0 });
+		expect(d.layout.safe).toEqual({ t: 1.5, b: 1.5, l: 1.5, r: 1.5 });
+		expect(d.label).toEqual({ w: 62, h: 34 });
+	});
+
 	it('omits the QR element when v1 had the QR turned off', () => {
 		const d = presetToDesign({ labelSettings: { showQRCodeMode: 'no' } });
 		expect(d.elements.some((e) => e.type === 'qr')).toBe(false);
diff --git a/client_v2/src/lib/labels/migrateV1.ts b/client_v2/src/lib/labels/migrateV1.ts
index 8ac7d59d..3de77bdb 100644
--- a/client_v2/src/lib/labels/migrateV1.ts
+++ b/client_v2/src/lib/labels/migrateV1.ts
@@ -133,11 +133,14 @@ function mapLayout(ps: V1PrintSettings): PrintLayout {
 		paper,
 		custom,
 		landscape: false,
+		// v1 users paired negative margins with a printer margin to pull an oversized
+		// grid cell back onto a label-sized page. Clamped, the safe-zone alone gives the
+		// same inset and the label is sized to the paper instead of that cell (#1149).
 		margin: {
-			t: ps.margin?.top ?? DEFAULT_LAYOUT.margin.t,
-			b: ps.margin?.bottom ?? DEFAULT_LAYOUT.margin.b,
-			l: ps.margin?.left ?? DEFAULT_LAYOUT.margin.l,
-			r: ps.margin?.right ?? DEFAULT_LAYOUT.margin.r
+			t: Math.max(0, ps.margin?.top ?? DEFAULT_LAYOUT.margin.t),
+			b: Math.max(0, ps.margin?.bottom ?? DEFAULT_LAYOUT.margin.b),
+			l: Math.max(0, ps.margin?.left ?? DEFAULT_LAYOUT.margin.l),
+			r: Math.max(0, ps.margin?.right ?? DEFAULT_LAYOUT.margin.r)
 		},
 		safe: {
 			t: ps.printerMargin?.top ?? 0,
diff --git a/client_v2/src/lib/labels/print.ts b/client_v2/src/lib/labels/print.ts
index efe74a22..1c30eebd 100644
--- a/client_v2/src/lib/labels/print.ts
+++ b/client_v2/src/lib/labels/print.ts
@@ -141,8 +141,10 @@ export async function printLabels({ design, bindings, layout, baseUrl }: PrintJo
 		style.textContent = pageCss(`${design.label.w}mm ${design.label.h}mm`);
 	} else {
 		buildSheetPages(root, items, design, layout);
-		const page = paperSize(layout);
-		style.textContent = pageCss(`${page.w}mm ${page.h}mm`);
+		// `size: auto`, as v1 did. A fixed size makes the browser pick the orientation
+		// and (in Chromium) hide the picker, and label printer drivers disagree on which
+		// way round a roll is, so any fixed choice prints rotated for someone (#1149).
+		style.textContent = pageCss('auto');
 	}
 
 	document.body.appendChild(style);