A single, very thin solid line border.

A single, medium-thickness solid line border.

A single, noticeably thick solid line border.

Two thin solid lines with a small gap between them.

A solid border that appears slightly sunken or pressed in, using shadows and highlights.

A solid border that appears slightly raised or pushed out, using highlights and shadows.

A solid border with smoothly curved corners instead of sharp 90-degree angles.

A border made of small, evenly spaced dots or short dashes.