FBA classifies product sizes into standard sizes and oversized items. The two can be further divided. Standard sizes are further divided into small standard sizes and large standard sizes; large items are further divided into small large items, medium large items, large large items and special large items.
Standard-size products refer to products that meet the following standards when fully packaged:
Weight ≤ 20 pounds;
Longest side (A) ≤ 18 inches:
The middle long side (B) ≤ 14 inches and the shortest side (C) ≤ 8 inches.
Items exceeding the above dimensions are considered bulky items.
If items are sold as a set, Amazon calculates the overall weight and dimensions of the entire set when packaged together.
The Special Oversized segment is for items that must be shipped using special shipping methods due to their size, weight, special handling requirements, or other restrictions.
For standard-size items weighing 1 pound or less and special oversize items, Amazon will use the item weight. For all other products, Amazon will use the greater of the unit weight or the dimensional weight. The volumetric weight is equal to the product volume (length x width x height) divided by 139.
The sum of length and circumference is calculated as follows:
Measure the length, height and width of the package;
Add the shortest side and the second longest side , then multiply by 2 to get the perimeter
·Add the longest side and the perimeter.