The Ultimate Image Size & Conversion Guide (2025 Definitive Cheat Sheet)

Welcome to the definitive Ultimate Image Size & Conversion Guide for 2025. In our visually-driven digital world, the size and quality of your images are not just details—they are critical to your success. Using the wrong dimensions can lead to blurry photos, awkward cropping, and slow websites. This guide is the only resource you will ever need to solve these problems.

Understanding the Fundamentals of Digital Images

Before diving into the numbers, it’s essential to understand the core concepts that govern image quality and size.

What is Resolution? (DPI vs. PPI)

Resolution refers to the detail an image holds. For professional, high-quality printed materials, 300 DPI is the industry standard. For web images, the actual pixel dimensions (e.g., 1080px wide) are far more important than the PPI value.

What is an Aspect Ratio?

An aspect ratio is the proportional relationship between the width and height of an image (e.g., 1:1 is a square, 16:9 is widescreen). We cover all common ratios in a dedicated section below.

The Complete Social Media Image Size Guide

Instagram Sizes

• Profile Picture: 320 x 320 pixels (displays as a circle)
• Feed Post (Square): 1080 x 1080 pixels (1:1). The classic.
• Feed Post (Portrait): 1080 x 1350 pixels (4:5). Recommended for engagement as it takes up the most screen space.
• Feed Post (Landscape): 1080 x 566 pixels (1.91:1). Use when a wide shot is unavoidable.
• Stories & Reels: 1080 x 1920 pixels (9:16). This is a full-screen vertical view.

Facebook Sizes

• Profile Picture: 180 x 180 pixels minimum (displays as a circle)
• Cover Photo: 851 x 315 pixels (Desktop). Displays as 640 x 360 pixels on mobile. Design within a central safe zone to avoid important elements being cropped.
• Post / Link Image: 1200 x 630 pixels (1.91:1). The optimal size for link previews.
• Square Post: 1080 x 1080 pixels (1:1). Excellent for feed visibility.
• Story: 1080 x 1920 pixels (9:16). Full-screen vertical content for stories.
• Event Cover Image: 1920 x 1005 pixels (16:9).
• Group Cover Image: 1640 x 856 pixels.

X (Twitter) Sizes

• Header: 1500 x 500 pixels.
• Post (16:9): 1600 x 900 pixels. Best for single in-feed images to display fully without cropping.
• Post (1:1): 1080 x 1080 pixels. A very common and effective size for Twitter.
• Post (4:5): 1080 x 1350 pixels. A taller format that takes up more space in the feed.

LinkedIn Sizes

• Personal Profile Banner: 1584 x 396 pixels.
• Company Cover Photo: 1128 x 191 pixels.
• Post / Link Image: 1200 x 627 pixels (1.91:1). Recommended for sharing articles.
• Square Post: 1080 x 1080 pixels (1:1). Great for company updates and text-based graphics.

Pinterest, YouTube & TikTok Sizes

• Pinterest Standard Pin: 1000 x 1500 pixels (2:3). Vertical pins perform best.
• Pinterest Square Pin: 1000 x 1000 pixels (1:1). Also supported, but less common.
• YouTube Channel Art: 2560 x 1440 pixels. Pay close attention to the central safe area (1546 x 423 pixels) where key content must be placed to be visible on all devices.
• YouTube Thumbnail: 1280 x 720 pixels (16:9). This is one of the most important images for your channel’s success.
• TikTok Video: 1080 x 1920 pixels (9:16).

Website, Blog & E-commerce Sizes

Website / Blog Best Practices

• Hero Image / Banner (16:9): 1920 x 1080 pixels. A standard for full-width headers. Ensure any text is centered to be visible on different screen sizes. Compress well to avoid slow page load times.
• Blog Post Feature (16:9): 1200 x 675 pixels. A common size for blog post headers and for sharing on social media.
• Blog Post Feature (Square 1:1): 1200 x 1200 pixels. Ideal for grid-based blog layouts and for sharing on platforms that favor square images.
• In-Content Images: Should be no wider than your main content area, typically between 800-1200 pixels wide.

E-commerce Best Practices

• Product Image (Square 1:1): 2048 x 2048 pixels. This is the recommended standard for most platforms like Shopify and Amazon. It allows for high-quality zoom functionality, which is critical for sales.
• Product Image (Portrait 2:3): e.g., 1200 x 1800 pixels. Often used for fashion items where vertical height is important, like dresses or coats.
• Product Image (Landscape 3:2): e.g., 1800 x 1200 pixels. Can be used for wider items like furniture or electronics. Consistency is key, so choose one primary orientation for all your product shots if possible.

Digital Advertising Image Sizes

Using the correct ad dimensions is non-negotiable for campaign performance and avoiding ad rejection.

Google Display Network (Most Common)

• Medium Rectangle: 300 x 250 pixels
• Large Rectangle: 336 x 280 pixels
• Leaderboard: 728 x 90 pixels
• Half Page: 300 x 600 pixels
• Large Mobile Banner: 320 x 100 pixels

Facebook / Instagram Ads

• Feed Ad (1:1): 1080 x 1080 pixels
• Stories / Reels Ad (9:16): 1080 x 1920 pixels
• Carousel Ad (1:1): 1080 x 1080 pixels per card.
• Right Column Ad (Facebook): 1080 x 1080 pixels.

Aspect Ratios Explained

This section explains the common aspect ratios available in our tool and their primary uses.

• Square (1:1): A perfect square. The workhorse of social media (Instagram, Facebook).
• Widescreen (16:9): The standard for video (YouTube), TV screens, and website banners.
• Tall (9:16): The full-screen vertical format for Stories and Reels (Instagram, Facebook, TikTok).
• Standard (4:3): The classic TV and computer monitor ratio. Still used in some digital photography.
• Portrait (3:4): A taller portrait format, slightly less tall than the 4:5 ratio.
• Landscape (3:2): The standard aspect ratio for photos from most DSLR cameras.
• Portrait (2:3): The vertical orientation of the 3:2 ratio, standard for Pinterest Pins.
• Free Aspect Ratio: This option allows you to drag the crop box to any shape you desire, giving you complete creative control.

Complete Print & Document Size Guide (at 300 DPI)

For professional results, print files must be designed at 300 DPI. Use our converter tool for custom sizes or this chart for standards.

ISO A-Series Paper Sizes (International Standard)

• A4/A5/A6 Portrait (ISO): These are defined by the ISO 216 standard. Their pixel dimensions at 300 DPI are:
  • A4: 2480 x 3508 pixels
  • A5: 1748 x 2480 pixels
  • A6: 1240 x 1748 pixels
• A4/A5/A6 Landscape (ISO): Simply the reverse of the portrait dimensions. (e.g., A4 Landscape is 3508 x 2480 pixels).

US Paper & Photo Sizes

• US Letter Portrait (8.5×11 in): 2550 x 3300 pixels
• US Letter Landscape (11×8.5 in): 3300 x 2550 pixels
• Photo (4×6 Portrait): 1200 x 1800 pixels
• Photo (6×4 Landscape): 1800 x 1200 pixels
• Photo (5×7 Portrait): 1500 x 2100 pixels
• Photo (7×5 Landscape): 2100 x 1500 pixels
• Photo (8×10 Portrait): 2400 x 3000 pixels
• Photo (10×8 Landscape): 3000 x 2400 pixels

Choosing the Right Image File Format

The format you save your image in has a huge impact on quality and file size.

• JPG (JPEG): Best for photographs. It uses “lossy” compression, which intelligently removes data that the human eye won’t miss to create a much smaller file. Perfect for web page speed.
• PNG: Best for graphics, logos, and images that require a transparent background. It uses “lossless” compression, which maintains all data but results in larger files. Do not save photos as PNGs.
• WebP: A modern format developed by Google. It offers much smaller file sizes than JPG and PNG at similar quality, and supports transparency. It is the best choice for web images if your platform supports it.
• SVG: Best for logos and icons. It’s a vector format, not pixel-based. This means it’s infinitely scalable without any loss of quality, making it perfect for responsive website design.