When it comes to deciding on the size of a weathervane for your cupola, there are a few things to take into consideration. The first is the size of the cupola itself. You'll want to make sure that the weathervane is in proportion to the rest of the structure - too big and it will look out of place, too small and it may get lost amongst the other features.
The second thing to consider is the location of the cupola. If it's situated up high on a roof, then you'll need to factor in wind speed and direction when choosing your weathervane size. A larger vane will be more resistant to strong winds, whereas a smaller one may be more suitable if you're located in an area with lighter breezes.
Ultimately, there's no right or wrong answer when it comes to selecting a weathervane size for your cupola - it's all about finding what looks best and functions well for your specific situation. With a little bit of planning and thought, you can find the perfect option to top off your beautiful home.