diff --git a/server/commands/documentDuplicator.test.ts b/server/commands/documentDuplicator.test.ts
index 3c5a636852..69db89dfba 100644
--- a/server/commands/documentDuplicator.test.ts
+++ b/server/commands/documentDuplicator.test.ts
@@ -200,4 +200,64 @@ describe("documentDuplicator", () => {
     );
     expect(duplicatedChild?.sourceMetadata?.fileName).toEqual("child.md");
   });
+
+  it("should copy fullWidth property when duplicating document", async () => {
+    const user = await buildUser();
+    const original = await buildDocument({
+      userId: user.id,
+      teamId: user.teamId,
+      fullWidth: true,
+    });
+
+    const response = await withAPIContext(user, (ctx) =>
+      documentDuplicator(ctx, {
+        document: original,
+        collection: original.collection,
+      })
+    );
+
+    expect(response).toHaveLength(1);
+    expect(response[0].fullWidth).toBe(true);
+  });
+
+  it("should copy fullWidth property to child documents when duplicating recursively", async () => {
+    const user = await buildUser();
+    const collection = await buildCollection({
+      teamId: user.teamId,
+      userId: user.id,
+    });
+
+    const original = await buildDocument({
+      userId: user.id,
+      teamId: user.teamId,
+      fullWidth: true,
+      collectionId: collection.id,
+    });
+
+    await buildDocument({
+      userId: user.id,
+      teamId: user.teamId,
+      parentDocumentId: original.id,
+      fullWidth: true,
+      collectionId: collection.id,
+    });
+
+    const response = await withAPIContext(user, (ctx) =>
+      documentDuplicator(ctx, {
+        document: original,
+        collection: original.collection,
+        recursive: true,
+      })
+    );
+
+    expect(response).toHaveLength(2);
+
+    // Check parent document
+    const duplicatedParent = response.find((doc) => !doc.parentDocumentId);
+    expect(duplicatedParent?.fullWidth).toBe(true);
+
+    // Check child document
+    const duplicatedChild = response.find((doc) => doc.parentDocumentId);
+    expect(duplicatedChild?.fullWidth).toBe(true);
+  });
 });
diff --git a/server/commands/documentDuplicator.ts b/server/commands/documentDuplicator.ts
index b8c05a9928..ba47943b13 100644
--- a/server/commands/documentDuplicator.ts
+++ b/server/commands/documentDuplicator.ts
@@ -35,6 +35,7 @@ export default async function documentDuplicator(
     parentDocumentId,
     icon: document.icon,
     color: document.color,
+    fullWidth: document.fullWidth,
     title: title ?? document.title,
     content: ProsemirrorHelper.removeMarks(
       DocumentHelper.toProsemirror(document),
@@ -85,6 +86,7 @@ export default async function documentDuplicator(
         parentDocumentId: duplicatedDocument.id,
         icon: childDocument.icon,
         color: childDocument.color,
+        fullWidth: childDocument.fullWidth,
         title: childDocument.title,
         content: ProsemirrorHelper.removeMarks(
           DocumentHelper.toProsemirror(childDocument),
diff --git a/server/routes/api/documents/documents.test.ts b/server/routes/api/documents/documents.test.ts
index 1353d41bb2..1876d1057b 100644
--- a/server/routes/api/documents/documents.test.ts
+++ b/server/routes/api/documents/documents.test.ts
@@ -5634,6 +5634,69 @@ describe("#documents.memberships", () => {
   });
 });
 
+describe("#documents.duplicate", () => {
+  it("should require authentication", async () => {
+    const res = await server.post("/api/documents.duplicate");
+    expect(res.status).toEqual(401);
+  });
+
+  it("should duplicate a document with fullWidth property", async () => {
+    const user = await buildUser();
+    const document = await buildDocument({
+      userId: user.id,
+      teamId: user.teamId,
+      fullWidth: true,
+    });
+
+    const res = await server.post("/api/documents.duplicate", {
+      body: {
+        token: user.getJwtToken(),
+        id: document.id,
+      },
+    });
+    const body = await res.json();
+
+    expect(res.status).toEqual(200);
+    expect(body.data.documents).toHaveLength(1);
+    expect(body.data.documents[0].fullWidth).toBe(true);
+  });
+
+  it("should duplicate child documents with fullWidth property when recursive=true", async () => {
+    const user = await buildUser();
+    const collection = await buildCollection({
+      userId: user.id,
+      teamId: user.teamId,
+    });
+    const parent = await buildDocument({
+      userId: user.id,
+      teamId: user.teamId,
+      collectionId: collection.id,
+      fullWidth: true,
+    });
+    await buildDocument({
+      userId: user.id,
+      teamId: user.teamId,
+      collectionId: collection.id,
+      parentDocumentId: parent.id,
+      fullWidth: true,
+    });
+
+    const res = await server.post("/api/documents.duplicate", {
+      body: {
+        token: user.getJwtToken(),
+        id: parent.id,
+        recursive: true,
+      },
+    });
+    const body = await res.json();
+
+    expect(res.status).toEqual(200);
+    expect(body.data.documents).toHaveLength(2);
+    expect(body.data.documents[0].fullWidth).toBe(true);
+    expect(body.data.documents[1].fullWidth).toBe(true);
+  });
+});
+
 describe("#documents.empty_trash", () => {
   it("should require authentication", async () => {
     const res = await server.post("/api/documents.empty_trash");