How To Enlarge Blogger Profile Image

First make sure you have added blogger profile gadget and use good quality picture to enlarge it because if you have low quality image then pixel of picture can split and your image looks blur.To avoid the problem of blur use quality image.

How to re size or change profile image

Changing the size of profile picture is very easy.first login to your blog
Go to Template and press customise

Go to Advanced  at the left side

scroll and click add  CSS 

Note:Press enter after the last character of the last line } if you already add any css.

Add below css code there and apply to blog

.profile-img{ height: auto; width: 200px; }
Now visit your blog and you can see your image size enlarge.If you still want to make it big change the width according to your requirement and never forget to press apply to blog before visiting your blog.