Hi Christina
Thank you very much for your interest in the Otto Schumacher Venice bridle.
It is very rare that a horse needs size 3, but it happens. There is a 10% surcharge on the Oversize.
The best thing to do is to measure you horse, that was we will know for sure what size you'll need.
There are so many options on the OS bridles that they are ordered to your specifications, and therefore there is a delivery time that is 8-12 weeks.
Thank you,
Katja