Make ReCAPTCHA's image to one word

I'm using the custom theme of recaptcha, and the designer want that the recaptcha's image will be smaller in the width but not in the height. Is there a way to do it? -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://groups.google.com/group/recaptcha. For more options, visit https://groups.google.com/groups/opt_out.