📷 Instagram

• Feed square: 1080×1080
• Feed portrait: 1080×1350 (4:5)
• Stories / Reels: 1080×1920 (9:16)
• Profile: 320×320 (circular)
• Feed landscape: 1080×566 (1.91:1)

▶️ YouTube

• Thumbnail: 1280×720 (16:9)
• Channel art: 2560×1440 (safe area 1546×423)
• Profile: 800×800
• Shorts: 1080×1920
• Community image: 1080×1080

🐦 X (Twitter)

• Profile: 400×400 (circular)
• Header: 1500×500
• Post image: 1600×900 (16:9)
• Card image: 1200×628

💼 LinkedIn

• Profile: 400×400
• Cover: 1584×396
• Post: 1200×627
• Company logo: 300×300
• Company cover: 1128×191

📘 Facebook

• Profile: 170×170 (mobile 128×128)
• Cover: 851×315
• Post: 1200×630
• Story: 1080×1920

🎵 TikTok

• Video: 1080×1920 (9:16)
• Profile: 200×200
• Cover: 1080×1920 (thumbnail)

📌 Pinterest

• Standard pin: 1000×1500 (2:3)
• Square pin: 1000×1000
• Idea pin: 1080×1920
• Profile: 165×165

🛠 Tools

• Size calculator: SNS Sizes
• IG 9-grid: 9-Tile
• YouTube thumbnail: Thumbnail
• LinkedIn image: LinkedIn Image
• Resize: Resize

💡 Tip: one 1080×1920 covers Stories, Reels, Shorts, TikTok. 9:16 is the universal standard.