Express Box Size Calculator

Introduction

A postal standard box selection calculation tool. Enter the length, width, and height (in millimeters) of the items you want to put in the box, and it will calculate the most suitable postal standard box size. Note: There may be slight variations in box dimensions from different manufacturers.

Postal Standard Box Size Table

Length, width, and height of different box models in millimeters (mm). Generally, manufacturers produce boxes based on external dimensions. To calculate the size of items that can be contained, you need to subtract the thickness of the box (3-5 millimeters) from the box dimensions.