It looks like it might require some javascript coding since its not as easy as “opening in a new regular sized window”. You can search for it on Google to see a lot of tutorials on it if that helps – https://www.google.com/search?client=safari&rls=en&q=Open+Link+in+New+Small+Window
Keep in mind, one particular way may not work for every browser. Each browser may have their own requirements.
