Identify length consistently
Length is normally the longest side. The other two sides become width and height; their names matter less than using all three accurately.
Record before rounding
Keep your measured values, then let the selected rule apply its own rounding. Rounding early can compound the result or hide a threshold.
Measure a finished rectangular carton
Place the closed parcel on a flat surface. Measure the longest side, then the remaining two sides at their widest points. Keep the raw measurements with the carton record and let the selected carrier rule perform its own rounding.
- Include tape seams, bulges and protrusions
- Do not copy nominal box-catalogue dimensions
- Use a scale suited to the package range
- Re-measure after changing product quantity or cushioning
Treat irregular packages as an outer envelope
For a tube, bag or uneven parcel, measure the smallest rectangular envelope that contains the item at its extreme points. Then verify the exact service rules because some nonrectangular packaging can trigger separate handling treatment.
Questions this guide should answer
When should I measure the package?
Measure after the parcel is packed, closed and resting naturally. Product or empty-box dimensions are not a reliable substitute.
Should I round the measurements myself?
Record the actual measurements first. Apply rounding only in the order required by the selected carrier rule.