Adjusting the company logo size within an email template - how?

Adjusting the company logo size within an email template - how?

We try to use the company logo that we have in Zoho CRM in our standard emails from Zoho CRM. The Logo however is very "large" and as such looks to large if we just use the code: 

" ${companyLogo}"

What would the code be to resize the logo above in the email template? Is that possible within that code to set the size on the logo/image to for example:
90 x 30


Does anyone know how?