Answer:
1 : 1000
In the real life, it measures as:
62 mm = 62000 mm = 6.2 m
54 mm = 54000 mm = 5.4 m
It ask how large is it, I don't know if you want area or primeter, so I will give you both of them.
Area:
6.2 x 5.4 = 33.48 m^2
Primeter:
(6.2 + 5.4)2 = 23.2 m.