[Shipping module - standard shipping] How include dimmensions?

[Leukemams]

For my carrier i need dimmensions included in my shipping module.

For the weight part it works perfectly, but i doesn't include the dimensions.

I want (just like the weight) the dimensions calculated in the shipping.

example

a small pakage under 3 kilo (6 pound) kan be 1 meter (about 3 feet) or can be 30cm (about 1 feet)

the first is pakage the second can be send by mailbox and that's cheaper.

Is there another module or can i edit the script somewher?

Hope someone can help.

[mr9sky]

I would want such a feature too! My shipper offers certain cheaper rates for smaller sized  items.