These are the correct sizes for YouTube graphics:
- YouTube Thumbnail: 1,280 × 720 pixels
- YouTube Banner: 2,560 × 1,440 pixels
- YouTube Video (4K): 3,840 × 2,160 pixels
- YouTube Profile Picture: 800 × 800 pixels
- Banner in Desktop Display: 2,560 × 423 pixels
- Banner in Tablet Display: 1,855 × 423 pixels
- Banner in Mobile Display: 1,546 × 423 pixels
- Banner in TV Display: 2,560 × 1,440 pixels
It's important to note that the aspect ratio for YouTube thumbnails and video previews should be 16:9. For the banner, the safe area where text and logos will be displayed is 1,546 x 423 pixels, but the full banner should be designed at 2,560 x 1,440 pixels to ensure it looks crisp on all devices. Also, keep in mind that these dimensions are subject to change as YouTube updates its platform.