What are the minimum outer dimensions for a Category A package?

• A. 4 mm x 4 mm
• B. 100 mm x 100 mm
• C. 4 mm x 4 mm x 4mm
• D. 100 mm x 100 mm x 100 mm

Answer: (D)

This item tests understanding that a Category A package must meet a three-dimensional size requirement. The outer dimensions must be at least 100 mm in every direction, so the smallest box that satisfies this is a cube with sides of 100 mm.

A two-dimensional measurement (100 mm x 100 mm) doesn’t specify height, so it isn’t sufficient for a three-dimensional package. The very small options (4 mm in any dimension) are far too small to hold the inner packaging, cushioning, and contents needed for Category A shipments.

So the minimum outer dimensions are 100 mm x 100 mm x 100 mm.