I have products which have different weight and length
Example:
Product 1 - 2.5kg 1.8m length
Product 2 - 1.9kg 2.3m length
product 3 - 2.2kg (only has weight - size is small and do not accrue)
...
...

When the shipment (at the moment) I use a table by weight.
But the introduction of long products has forced me to charge an additional fee depending on length.
So if the product is:
- Small - should be calculated by weight (table weight)
- Long - should be calculated by weight and I have to add an additional fee for the size (dimension and weight table)
How does it perform?
Which module use?
How do I insert a length of products subject card (product, options ..) which will be charged for shipping?

Please help me (I use ver.1.3.8)
Best Regards to All.. Sorry for my English