What unit is used for measuring wood shakes?

The correct choice is squares, which is a unit commonly used in the roofing industry to measure materials like wood shakes. One square is equivalent to an area of 100 square feet. This standardized unit helps professionals easily calculate the amount of material needed for roofing projects, simplifying the planning and purchasing process.

Bundles, on the other hand, typically refer to a packaged quantity of wood shakes, but do not provide a consistent measurement for calculating coverage on a roof. Planks refer to the individual pieces of wood and are not a measurement unit for roofing application. Pallets are used to transport and store a larger quantity of materials but do not directly relate to the specific measurement of wood shakes needed for installation. Therefore, squares is the most relevant and practical unit for this context.