add image dimensions

hello

I have this code that scales thumbnails

<?php do_shortcode('[image-resize height=50 width=50 ref=h default= the_post_thumbnail( );]');
	?>

default means the image that I want to resize.

how can I output the dimensions

For now the output is <img src =”example.jpg” alt =”alt”>

I want to add width and height of the resized image.

Im using Image Resizer On The Fly Plugin