The Instagram IGTV Cover size (420×654px)
The IGTV cover at 420x654 pixels is the portrait thumbnail Instagram uses to represent longer videos, and it follows a roughly 1:1.55 vertical shape that is taller than a standard photo but not as tall as a full Reel. Sizing your cover art to these exact dimensions keeps the thumbnail crisp in the video tab and prevents the soft, stretched look you get when Instagram scales a mismatched image to fit the slot.
Where IGTV covers get tricky is the profile preview. On the main profile grid Instagram shows only a square center crop of your 420x654 cover, so a design that looks balanced on the video tab can lose its top and bottom on the grid. The safest approach is to place your title and key subject in the vertical middle of the frame so the same artwork works whether it is displayed as the full portrait thumbnail or the cropped square preview.
Because IGTV covers are essentially a browsing decision, a clean, high-contrast design with a short label reads far better than dense text at this small size. Building the artwork at the native 420x654 canvas means your text renders sharply and nothing is resampled at upload. This tool resizes 100% in your browser with no upload, it is free, and it preserves the aspect ratio. Instagram has folded long-form video into the broader video experience over time and continues to change these layouts, so verify the current cover spec before you commit.