How To Add Inner 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'>

#inner-borders a img, #inner-borders a { border: none; overflow: hidden; float: left; }
#inner-borders a:hover { border: 3px solid #0000ff; }
#inner-borders a:hover img { margin: -3px; }

</style>

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

4.Now add your images as below.

<div id="inner-borders">

<a href="#"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibTL-PYgI4j8rBR3IgwqurqmlOsQOJ8rdoFJEq1WvoTcwznGGR5l0T75UqeyvPa8x2gvjayL9R2nQWqsDNsckNocO0koHlu1Ik82FeMWFsfVfuPJwVVCpJg6xqNkqiJgwsdoeZ3uwms3LQ/+1+small.jpg" alt="#" /></a>

<a href="#"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCxvxEMP_9xSfZYs6nphSNJ1UvQBgEct9vSM-_ofXAmuI5nL9itHax9zyUZakY2Nr5jBm5dvyUYSzQsfi9zk3QM4dpgH-OV0BJBErBPCpuYLgLkHIJtXz0ZwjUNodOAwLWXxaidzs17cGV/+2+small.jpg" alt="#" /></a>

<a href="#"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi35IMHTaAVzJqDbOPV2hdRxFK2EV0CvKOD4WflUaLy5rnev92_rjPA_KfTbQn-oSis_2QrZyQjrAyt2RbQZUwpt57EHrJ7DntX2xb56BoU1aTF7jpJeDcKc40MhTFqqtKxZcPAiX_qdeKq/+3+small.jpg" alt="#" /></a>

</div>

Now click Save