From their website... The windscreen is 4.9″ in diameter and we recommend at least a 1/4″ clearance (4.4″ diameter). As a reference, the Snow Peak Trek 700 is 3.8 and the TOAKS 750 ml mug is 4.0 ” in diameter. My windscreen for a Soto Amicus is actually closer to 4.75" diameter.
We support mugs up to about 4.4". A partial list of mug compactability can be found on our site. https://www.flatcatgear.com/ocelet/ocelot-windscreens/
Thanks for the offer, Jon. I've not written it off though. I haven't even tried it outside yet. I have an idea to mod the base to make it folding so it will fit in a pot. If I can make that work then it might make it as far as my next trip
Our goal is to make sure that you are satified with our gear, keep me posted. BTW, you are correct, there was a mistake on the website: windscreen diameter is 4.7" and the maximum recommended mug diameter is 4.2". This still aligns with a vast majority of mugs that are 750 ml and under. - Jon