One of the questions I get asked the most about photography relating to my blog is,
How do you make your pictures bigger? I attempted once to explain in a not so well written tutorial, but hopefully this time I can do a better job.
Going from this:

To this...
My way.
The first way and probably easiest is to upload your image (at the size you want it to appear on your blog) to a third party host like photobucket.com. Then you just cut and paste the picture's url in your post and viola! There it is. Here is a great tutorial on how to do it this way:
click here.I wanted to have total control over my pictures, so I went searching for another alternative and searching I did. I found a few tutorials online changing the html code, but none worked for me, so I adapted and took parts from each. This is what I have found
works for me.
Note: if you are making your pictures bigger on your blog you may need to adjust the width of your blog template, by editing the html of the template. The above tutorial shows you how to do that.
Here is how I post my images large on my blog:
1) Start by resizing your picture to the size you want it (probably somewhere between 400-500 pxls). (note: you should always be resizing your pics on your blog even if your wanting them the regular blogger size as to not take up too much space. I learned this the hard way!)
2) Upload this resized picture as you normally would do.
3) When I upload a picture it doesn't show a picture, it shows the html code for that picture. If yours shows the picture you need to click on the button to view the code. It should look something like this:

4) Delete the highlighted code.

Should now look like this:

6) Save. And preview, you should see your picture the size you want it! Now publish! If you publish it and the picture runs into your columns that means you'll need to change the margins on your blog template (see tutorial link above).
Yipee!! You did it! I hope to see some
larger pictures out there now!

Good luck! Please let me know if this was helpful.
Have a fabulous weekend!