Instagram Ad Sizes and Formats Guide for Shopify

Instagram supports multiple ad formats, each with different dimension requirements, aspect ratios, and file specifications. Using the wrong size means your Shopify product gets cropped awkwardly, displayed with black bars, or rejected by Instagram's ad review. Most Shopify merchants waste hours researching current specs across scattered blog posts, many of which are outdated. Even after finding the right dimensions, resizing product images to meet each format's requirements adds another layer of work — especially when you need Feed, Stories, and Reels versions of the same Shopify product ad. A wrong dimension here or there leads to wasted ad spend on unprofessional-looking creatives that drive potential customers away from your Shopify store rather than toward it.

The Complete Instagram Ad Size Reference for Shopify Merchants

Getting Instagram ad dimensions wrong is one of the most common and costly mistakes Shopify merchants make. A creative designed at the wrong size gets cropped, stretched, or displayed with black bars — instantly killing credibility and wasting ad spend. This guide covers every Instagram ad format’s exact specifications, so your Shopify product ads always look professional.

A3 AI Ads handles all of these dimensions automatically. Select your format and the AI generates your Shopify ad at the correct size with proper layout and safe zones. But understanding the specs helps you make informed decisions about which formats to use.

Instagram Feed Ad Sizes

Square Format: 1080x1080 (1:1)

The classic Instagram ad format. Square ads are versatile, work well for most Shopify products, and display consistently across all devices. They’re the safest choice for Shopify merchants testing Instagram ads for the first time.

Specs:

• Dimensions: 1080 x 1080 pixels
• Aspect ratio: 1:1
• File types: JPG, PNG
• Maximum file size: 30MB
• Recommended text on image: Under 20%

Portrait Format: 1080x1350 (4:5)

Portrait ads take up more vertical screen real estate than squares, which means more visual presence as users scroll. For Shopify product ads, the extra vertical space gives you room for product imagery plus a benefit statement. A3 AI Ads generates 4:5 portrait creatives that use this extra space strategically.

Specs:

• Dimensions: 1080 x 1350 pixels
• Aspect ratio: 4:5
• File types: JPG, PNG
• Maximum file size: 30MB
• Recommended text on image: Under 20%

Landscape Format: 1080x566 (1.91:1)

Landscape ads are supported but rarely recommended for Shopify product advertising. They occupy less screen space than square or portrait, giving your ad less visual impact. Most Shopify merchants should avoid landscape for Instagram Feed.

Specs:

• Dimensions: 1080 x 566 pixels
• Aspect ratio: 1.91:1
• File types: JPG, PNG
• Maximum file size: 30MB

Instagram Stories Ad Size

Full-Screen Vertical: 1080x1920 (9:16)

Stories ads fill the entire mobile screen — maximum immersion, maximum attention. This is the format for flash sales, new product launches, and time-sensitive Shopify promotions. A3 AI Ads generates Stories creatives with safe zones accounted for — no product imagery or text in the UI overlay areas.

Specs:

• Dimensions: 1080 x 1920 pixels
• Aspect ratio: 9:16
• File types: JPG, PNG (image), MP4, MOV (video)
• Maximum file size: 30MB (image), 250MB (video)
• Video length: Up to 120 seconds
• Safe zone: Keep key content within the middle 60% vertically

Instagram Reels Ad Size

Full-Screen Vertical Video: 1080x1920 (9:16)

Reels ads share the same dimensions as Stories but are optimized for the Reels feed. They reach users in discovery mode — actively browsing for new content. For Shopify stores, Reels ads are excellent for brand awareness and introducing products to new audiences.

Specs:

• Dimensions: 1080 x 1920 pixels
• Aspect ratio: 9:16
• File types: MP4, MOV
• Maximum file size: 250MB
• Video length: Up to 90 seconds
• Safe zones: Similar to Stories — keep key content centered

A3 AI Ads generates Reels-ready video creatives for your Shopify products at exactly these specifications.

Instagram Carousel Ad Sizes

Square Cards: 1080x1080 (1:1)

Carousel ads display 2-10 swipeable cards. Each card must be the same dimension — mixing sizes isn’t allowed. The standard is 1080x1080 square. For Shopify stores, carousels are ideal for multi-product showcases and product feature highlights.

Specs:

• Card dimensions: 1080 x 1080 pixels per card
• Aspect ratio: 1:1 (all cards must match)
• Number of cards: 2-10
• File types: JPG, PNG (image), MP4 (video)
• Maximum file size: 30MB per card (image)

A3 AI Ads generates coordinated carousel cards with consistent visual styling across all cards for your Shopify products.

Which Instagram Ad Size Should Your Shopify Store Use?

For General Product Advertising

Start with 1080x1350 portrait Feed ads. They offer the best balance of screen presence and broad reach. A3 AI Ads generates these by default when you select the Instagram Feed format for your Shopify product.

For Flash Sales and Launches

Use 1080x1920 Stories ads. The full-screen format creates urgency and focuses attention entirely on your Shopify promotion. Generate these with A3 AI Ads’ Stories format.

For Brand Awareness

Use 1080x1920 Reels ads. Reels reach users in discovery mode who are open to finding new products and brands. A3 AI Ads generates video-ready Reels creatives for your Shopify store.

For Multi-Product Showcases

Use 1080x1080 Carousel ads. Show 3-5 Shopify products in one ad, each with its own link to the product page. Generate consistent card creatives with A3 AI Ads.

For Full-Funnel Campaigns

Generate all formats. Use A3 AI Ads to create Feed, Stories, Reels, and Carousel creatives for the same Shopify product. Run them together in a campaign with automatic placements and let Instagram’s algorithm allocate budget to the best-performing format.

How A3 AI Ads Handles Instagram Ad Sizes for Shopify

A3 AI Ads eliminates the dimension guesswork entirely. When you select any Instagram format, the app generates your Shopify product ad at the exact correct pixel dimensions with:

• Proper safe zones for Stories and Reels UI overlays
• Format-specific composition — not just resized versions of the same image
• Mobile-first text sizing that’s readable on phone screens
• Correct file format and size within Instagram’s requirements

Generate a Feed ad, a Stories ad, and a Reels ad for the same Shopify product in under 3 minutes. Each one is natively designed for its placement — not a one-size-fits-all compromise. Start free with 5 ads/month or unlock unlimited generation at $9.99/month.