Social Media Design Guide 2026 — Sizes, Specs & Best Practices

Platform Size Reference 2026

Instagram Design Tips

Instagram is a visual-first platform where aesthetic consistency matters more than anywhere else. Key principles:

• Grid consistency: Your last 9 posts are always visible together on your profile. Plan your colour palette and visual style so they work cohesively as a set.
• Text readability: Keep text to a minimum. Instagram is a scrolling medium — your image needs to communicate in under 1 second.
• Safe zones for Stories: Keep all important content and text away from the top 250px and bottom 400px, which are covered by UI elements and CTAs.
• Portrait format outperforms square: 4:5 (1080 × 1350px) takes up more screen real estate in the feed, leading to better engagement.

LinkedIn Design Tips

LinkedIn is a professional platform where document carousels (multi-slide PDFs) consistently outperform single static images for reach and engagement.

• Document carousels: Design slides at 1080 × 1080px, export as PDF, upload as a "document" post. These generate 3x more impressions than regular image posts.
• Text-forward design: LinkedIn's audience responds to information density. Carousels with substantive data, lists, or frameworks outperform aesthetic-only designs.
• Cover slide is your ad: The first slide determines whether someone swipes through. Make the value proposition immediately clear: "5 things I learned in 10 years of SaaS" beats a pretty illustration.
• Consistent branding: Every carousel should include your name/logo on the last slide. Many people share carousels without the original post — your brand needs to be embedded in the asset.

TikTok Thumbnail & Cover Tips

TikTok's cover image (the thumbnail shown on your profile grid) is often overlooked but significantly impacts profile visit-to-follow conversion rates.

• Text on covers: Unlike Instagram, text-on-cover works well on TikTok. Include the video topic in 3–5 words.
• Consistent cover style: Use the same font, colour, and layout style across your covers. Your profile grid becomes a branded portfolio.
• High contrast: TikTok thumbnails are small on the profile grid. Ensure your design is legible at 100px wide.

5 Universal Design Rules for Social Media

1. Design for mobile first. Over 80% of social media is consumed on phones. Check every design on a phone screen before publishing.
2. Use brand colours consistently. Followers should recognise your content before they see your name.
3. Less text = more engagement. If you need to say a lot, use a carousel — not a single image stuffed with text.
4. Test dark and light backgrounds. Some audiences respond better to dark designs; others to light. A/B test and let data decide.
5. Always export at highest quality. Most platforms compress images. Start at the highest resolution possible to minimise quality loss.

Design Tools for Social Media

The best design tools for social media non-professionals include platform-specific templates, correct preset dimensions, and easy brand kit management. Our reviews cover the top four options.