Personally, I think that if the parcel is really big, it can't be delivered by itself. However, there is no way to send it. At the same time, if it can be delivered the next day, it means the parcel is not that big.
I personally think that if a large parcel is actually not deliverable by itself, there is no way to deliver it. Meanwhile, if another day can be delivered, it means that the parcel is not that big.