To find the size of each property, divide the total area of the land by the number of properties.
1.6 hectares divided by 4 properties is calculated as follows:
\[ \text{Size of each property} = \frac{1.6 \text{ hectares}}{4} = 0.4 \text{ hectares} \]
So, each property will be 0.4 hectares in size.