Tobias Reed
Tobias Reed Production Knowledge Lead at 4OVER4.COM
Question

What is the difference between 3/8", 1/4" and 1/8" rounded corners?

Answer

The numbers on rounded corners refer to the radius of the curve, or how much of each corner gets rounded off. A bigger number means a larger, softer curve, while a smaller number keeps the corner closer to a sharp 90-degree edge.

RadiusLook
3/8"The most rounded, with the softest, most noticeable curve
1/4"A moderate curve, a middle-ground rounded look
1/8"The subtlest, closest to a standard sharp corner with just a gentle round

Choose 1/8" for a barely-there softening, 1/4" for a balanced rounded card, or 3/8" when you want the corners to be clearly curved. Keep important text and logos away from the corners so nothing is clipped by the rounding.

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