Image size affects page load speed: A 1-second delay in page load speed can result in a 7% reduction in conversions.

Optimizing image size is crucial to ensure a fast user experience.

Also worth reading: How Do You Optimize an AI Product Photography Workflow in 2026? · How Do You Optimize E-Commerce Visual Pipelines Without Making Every Product Shot AI? · How Can Retailers Optimize Creative AI Workflows for Product Imagery in 2026?

Most websites are oversized: 60% of websites exceed the recommended image size, leading to slowed page load speed.

Most hosts compress images automatically: Shopify, for instance, automatically compresses images to speed up page load.

However, manual optimization can further reduce file size.

File size affects SEO: Larger files can affect website indexing and slow down crawlers.

Optimize file size to improve SEO.

Square images are recommended: Square images (1:1 aspect ratio) are recommended for consistency across product pages.

Aspect ratio matters: Varying aspect ratios (e.g., 11:43, 32:43) can affect image quality and page load speed.

Content awareness is key: Consider the content's importance and audience's expectation when choosing image size.

Vertical and square images suit mobile screens: These shapes allow visitors to view more of the image without scrolling on mobile devices.

Optimize for desktop and mobile: Tailor image sizes for both desktop and mobile devices to ensure a consistent user experience.

Compression is essential: Use image optimization tools to compress files without sacrificing quality, reducing file size (typically between 70 KB to 100 KB).

Consistency is crucial: Ensure consistent image sizes across all product pages to maintain a cohesive store appearance.

File size limitations: Shopify has file size limitations (up to 20 MB) and recommends keeping images under 3 MB to prevent slowing down the website.

Automatic compression has limits: While hosts compress images automatically, manual optimization can further reduce file size for better load speed.

Keep in mind the original image size: When compressing, keep the original image size in mind to avoid degradation of image quality.

Collaborate with developers: Ensure that developers and designers are aware of these guidelines for optimal image size optimization.