What method is used when figuring out the size of a maple leaf?

Scientists use six main methods of studying biology. When, for example, a botanist examines a maple leaf, measuring its length, thickness, area, he uses a descriptive method of study, as he describes its properties and meanings. Of course, to study the leaves, you need to use not one leaf, but many, moreover, from different trees that grow in different areas. So the study will be as accurate, correct and objective as possible. If a botanist begins to study the chemical composition of a leaf, then this is already an experimental method.