Facebook Marketplace Integration - How do I change the default shipping box size?

[Roshan_Richards]

A while ago I realized that my default box size in my Shopify store (which I need because most of my orders ship at that size) also was the default on my integrated Facebook Marketplace. However, for FB my orders are much smaller and the box size needs to be smaller.  I went back into Shopify and changed the default size to the smaller box, but FB MKPLC is STILL using the larger box and I am losing sales because the shipping is showing as way too hight.  Am I missing something?! 

Also, it would be a useful function to allow us to choose the default box sizes individually for each channel, don't you think?  I mean, if I am losing sales, so is Shopify. Just saying.