diff --git a/src/business-profile/business-profile.service.ts b/src/business-profile/business-profile.service.ts
index 7d49945..95cfcd4 100644
--- a/src/business-profile/business-profile.service.ts
+++ b/src/business-profile/business-profile.service.ts
@@ -549,7 +549,7 @@ export class BusinessProfileService {
     }
   }
 
-  /** Recommended banner aspect 18:4.5 (4:1). Soft-check when dimensions exist. */
+  /** Recommended banner aspect 18:6 (3:1). Soft-check when dimensions exist. */
   private async assertBannerMedia(businessId: bigint, mediaId: bigint) {
     const media = await this.prisma.media.findFirst({
       where: { id: mediaId, businessId },
@@ -562,10 +562,10 @@ export class BusinessProfileService {
 
     if (media.width && media.height && media.height > 0) {
       const ratio = media.width / media.height;
-      const target = 18 / 4.5; // 4
+      const target = 18 / 6; // 3
       if (Math.abs(ratio - target) / target > 0.12) {
         throw new BadRequestException(
-          'Banner aspect ratio should be about 18:4.5 (4:1)',
+          'Banner aspect ratio should be about 18:6 (3:1)',
         );
       }
     }
diff --git a/src/business-profile/business-profile.types.ts b/src/business-profile/business-profile.types.ts
index c3a113a..dccaf0c 100644
--- a/src/business-profile/business-profile.types.ts
+++ b/src/business-profile/business-profile.types.ts
@@ -41,7 +41,7 @@ export type BusinessProfile = {
   logoDarkUrl: string | null;
   faviconMediaId: string | null;
   faviconUrl: string | null;
-  /** Recommended aspect ratio 18:4.5 (4:1). */
+  /** Recommended aspect ratio 18:6 (3:1). */
   bannerMediaId: string | null;
   bannerUrl: string | null;
   categoryIds: string[];
diff --git a/src/business-profile/dto/update-business-profile.dto.ts b/src/business-profile/dto/update-business-profile.dto.ts
index 9f228f0..40f1f4e 100644
--- a/src/business-profile/dto/update-business-profile.dto.ts
+++ b/src/business-profile/dto/update-business-profile.dto.ts
@@ -136,7 +136,7 @@ export class UpdateBusinessProfileDto {
   @IsInt()
   faviconMediaId?: number | null;
 
-  /** Marketplace/storefront banner; recommended aspect 18:4.5 (4:1). */
+  /** Marketplace/storefront banner; recommended aspect 18:6 (3:1). */
   @IsOptional()
   @Type(() => Number)
   @IsInt()