border-style solid border-width 5px
border-style solid border-width thick
border-style solid border-width 5px 10px
border-style solid border-width 5px 10px 1px
border-style solid border-width 5px 10px 1px medium
Note: The "border-width" property does not work if it is used alone. Use the "border-style" property to set the borders first.