How to reduce table border thickness?

I am drawing one table with border=1 but it looks quite prominent as I am enclosing one image inside it so I want to make it thinner for better look and feel.

<table border=1 cellpadding=50 cellspacing=0><tr><td></td></tr></table>

How can I reduce border thickness?

You can style it like this:

td,
th {
  border: .1px solid black;
}

<table border=1 cellpadding=50 cellspacing=0>
  <tr>
    <td></td>
  </tr>
</table>

(JSFiddle demo)