So the standard size was 3cm to small had to add more rubber to make it fit hope it works will let you know next flood
Firstly i ordered floodshields not just one both different sizes secondly the order has not been fulfilled as of yet .i have not received anything .However when i do receive them i will leave feedback for you.
Had trouble attaching shield to door. Can't tighten the shield attachments tight enough . Could do with someone from floodshield to come round and advise.