If the image is rectangular (e.g., 200x100 pixels), `rounded-full` will create an ellipse.
<img src="200x100_image.png" class="rounded-full">
(Results in an oval)
Notice this is an ellipse, not a circle.
Using a square container (`w-32 h-32 rounded-full overflow-hidden`) and an image with `w-full h-full object-cover`.
Container:
<div class="w-32 h-32 rounded-full overflow-hidden">
Image:
<img src="..." class="w-full h-full object-cover">
This is now a perfect circle, even with a rectangular source image.