The recommended size for your thumbnail image is 1280 pixels wide by 720 pixels high, although you can drop down to a minimum of 640 pixels wide.
To encourage more people to watch your videos, verified YouTube users can upload custom video thumbnails. The minimum size for your profile photo is 98 pixels wide by 98 pixels high, but it’s recommended that you upload an image that’s 800 pixels wide by 800 pixels high. Note that your profile photo overlays the channel art. For example, the default area shown on a desktop browser is 1546 pixels wide by 423 pixels high. For starters, you have channel art (similar to a cover photo) that’s 2560 pixels wide by 1440 pixels high. YouTube offers a spec sheet of image sizes to use on the network.
Resize image for youtube channel art size: 2560 x 1440 pixels. Youtube cover photo, banner and Youtube channel art size resizer tool online. While YouTube is focused on video, there are a few key images that need to be sized correctly for optimal results. Youtube Banner Size, Youtube Cover Size, Channel Art Resizer Youtube Channel Art Size Dimensions / Profile Photo / Cover Photo
