[Update] 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.
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
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.
How to re size or change profile image
Changing the size of profile picture is very easy.first login to your blogGo to Advanced at the left side
scroll and click add CSS
Add below css code there and apply to blog
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.