Inserting images in post with a custom size

When i want to insert an image i uploaded into a wordpress post, i notice that i only have a few options in terms of sizes.

http://twitpic.com/3ghh8e/full

I’d like to add another size to insert images in my post. Any idea on how i can achieve that?

I just resize the images before uploading, then use the “full size” option, probably not the solution you’re after though…

You need to resize it proportionally within the HTML source code and not use that as your size editor.

ok easiest way is within wordpress itself

once u upload your image you can go to

Media > Library > find your image and say edit > once in edit say Edit Image

It has many tools like cropping aspect ratio resizing etc.
Check it out

Check out this tut here man I think it will help you do exactly what you are looking to do pretty easily! http://www.problogdesign.com/wordpress/automatic-wordpress-thumbnail-without-custom-field/

good luck!