solid: Border is a single solid line.
Example solid border
dotted: Border is a series of dots.
Example dotted border
dashed: Border is a series of short lines.
Example dashed border
double: Border is two solid lines.
Example double border
groove: Border looks as though it is carved into the page.
Example groove border
ridge: Border looks the opposite of groove.
Example ridge border
inset: Border makes the box look like it is embedded in the page.
Example inset border
outset: Border makes the box look like it is coming out of the canvas.
Example outset border
hidden: Same as none, except in terms of border-conflict resolution for table elements.
Example hidden border