The TikTok Profile Picture size (200×200px)
TikTok profile pictures display at a small 200x200 pixels in a 1:1 square, masked into a circle. Because TikTok is fast and video-first, the avatar is tiny in most places, on the right rail of a video, next to comments, and in search, so a clean square at this size keeps it as sharp as possible without blur.
The circle crop removes the square corners, so center your face or logo and leave a little padding to avoid clipping. At 200 pixels this image is already small, which means intricate detail simply will not survive; a single bold element is the only thing that stays legible when it shrinks to a fingernail-sized circle beside a playing video.
Since TikTok skews toward creators building a personal brand, a recognizable face or a simple bold logo works best. Uploading a crisp 200x200 rather than a larger file that TikTok will downscale, or a tiny one it will upscale, keeps the avatar looking intentional. Preview it small, because on TikTok this image almost never appears large.