Border width: border, border-2, border-4, border-8

• Per sisi: border-t, border-r, border-b, border-l

Border color: border-gray-200, border-red-500, dll.

Border radius:

• rounded-none (0)
• rounded-sm (2px), rounded (4px), rounded-md (6px)
• rounded-lg (8px), rounded-xl (12px), rounded-2xl (16px)
• rounded-full (9999px — lingkaran)
• Per sudut: rounded-t-lg, rounded-bl-md

Ring: outline dekoratif di luar elemen

<input class="ring-2 ring-blue-500 rounded-md">

Divide: border antar anak elemen

<div class="divide-y divide-gray-200">
  <div>Item 1</div>
  <div>Item 2</div>
</div>