How To Add Outer Borders to Images

1.Login to your blogger dashboard--> layout- -> Edit HTML

2.Scroll down to where you see </head> tag .

3.Copy below code and paste it just before the </head> tag.

<style type='text/css'>
 
#outer-borders a img, #outer-borders a  { border: none; float: left; }
#outer-borders a { margin: 3px; }
#outer-borders a:hover { outline: 3px solid #0000ff; }
 
</style>

Note:You can change border color,outline size,margin,... But both outline size and margin must have a same numerical value.

4.Now add your images as below.

<div id="outer-borders">
   
<a href="#"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiw4K3ex2PvHbtgP5WI7DNrUx7VNefIEpDxkg4mfJHZ7UsAjPBEqlAwnDKDTDstExAIUvHGyQ08KXUcpB2KUMRDPDvjetwvn2LMcmFRKRdp57m7eBaaHiUeza19YtJg4D5wuzJi0hU8KC8k/+1+small.jpg" alt="#" /></a>
   
<a href="#"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjzf5Aiw8uecwVWdw-ujZnTA3nj_FxKqzk3Qw9hWJNfOJC72AKCWnTzLJ7ODkSxl1rHK-DOzVY5Z0jhdSd-n8PD54D3wffxbLNIOP3wDXA7nc3LXF_RKS05k3ZSqk3SUCNimoYxZkQ7UrHY/+2+small.jpg" alt="#" /></a>
   
<a href="#"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5cq3EtqY0qN0238QxRyrY67XPbxjY5zj553lRIM4UV5r1Jd1SrwZjUmdgbz86BCXXhAvW3fyl65tu-StJ2GgUvetX5vXMTAJo5QSbfTGPsjL_lTd4akhW4f_jo5eg7qePXbS4AKpQ3oYl/+3+small.jpg" alt="#" /></a>     
  
</div>