How does Shipping API handle multiple pieces in one shipment?

GWAGWA Member Posts: 13
We are currently setting up our store and preparing to launch.  How does Lightspeed/(Easypost) or other API handle deciding ultimate package size when determining price for multiple items in a shipment?  For example, if I have 6 items that are all 6x6x4, that would ultimately fit in the same box, the size dimensions of the box wouldn't change, only the weight would.  How does it know not to calculate using a gigantic box (6 times dimensions)?


  • JulienDJulienD Member, Moderator, Lightspeed Staff Posts: 25 moderator
    edited November 2018

    This is how parcel dimensions are calculated in Lightspeed.

    Scenario 1: If the order contains one product:

    Lightspeed eCom communicate the exact dimensions of the product to EasyPost/ShipStation based on the dimensions entered for the product in the eCom back office.

    Scenario 2: If the order contains two products:

    Lightspeed eCom uses the highest Length and Height and uses the SUM of the Widths. This is also based on the dimensions registered in eCom and from this calculation our platform pulls the shipping rates from EasyPost/ShipStation.


    If I have two products of 4 x 4 x 4 and 3 x 3 x 3, the resulting parcel dimensions are

    • 4 x 7 x 4, so we can place the items side by side in the box.

    if I have items of 5 x 6 x 7 and 4 x 5 x 6, the resulting parcel dimensions are

    • 5 x 11 x 7, so we can place the items side by side in the box.

    Scenario 3: If the order contains more than two products:

    Lightspeed eCom uses the product with the biggest dimensions and communicates it to EasyPost/ShipStation.


    If I have items of 5 x 2 x 2, 4 x 4 x 4 and 1 x 1 x 10, the resulting parcel dimensions are

    • 5 x 4 x 10, which is a box that is at least big enough to fit any product

    Post edited by JulienD on

    eCom Support

    Lightspeed HQ

  • caudillsarcaudillsar Member Posts: 1

    What happens when customers buy multiple of the same length item, but we have a box that fits them laying on top of each other?

    Example: Our most popular seller is handmade kitchen brooms that are roughly 55x1x7, and people often buy multiple at once to give as gifts. We have 2-pack, 4-pack, and 10-pack boxes, that are about 57" long and have varying heights, but every time I try to enter the broom dimensions in eCom, the box size calculated is 110"+ on one side, for which ShipStation says that no shipping options are available or the shipping is so astronomical that no one will pay it.

    When I chatted with eCom help about this a couple of months ago when getting ShipStation, they said we could put a note that if customers wanted to order more than one to just call us for an accurate quote - but we are not staffed 24/7 and the majority of our eCom orders come after-hours. We would lose thousands in sales.

    Our other option was not to enter dimensions, which we chose to go with for the time being. However, we are losing a lot of money on shipping even though we upped the weight some of the brooms to try to make up for the missing dimensions.

    Is there any way to fix this that I or the person I chatted with didn't know???

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