One size approx 6.5cm wide by 5cm high - width will depend on family name, but keeping as close to 6.5cm as possible. (7cm at max)
" Name " Family / FU COVID / Party over 3 lines
Add surname or name text in the text box.
So you can add "Sellers Family" or "Charlotte's" for example
Can also use 2 names eg "Sally & Michael's"