Linking to a TimThumb thumbnail in WordPress
I have a WordPress Theme that uses TimThumb to create thumbnails. 
I want to have two links:

1. A link to the full size image
2. A link to a thumbnail of the image

I have figured out I can link to the full size image like this:

    <a href="<?php echo $thumbnail["fullpath"]; ?>">Link to full size image</a>

But how do I link to a thumbnail of the image?
Linking to a TimThumb thumbnail in WordPress
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I have a WordPress Theme that uses TimThumb to create thumbnails. 
I want to have two links:

1. A link to the full size image
2. A link to a thumbnail of the image

I have figured out I can link to the full size image like this:

    <a href="<?php echo $thumbnail["fullpath"]; ?>">Link to full size image</a>

But how do I link to a thumbnail of the image?