My package is too big to go First Class, but I don't want to pay Priority Mail rates. Should I go with Ground?
Ifyour package can't be sent First Class and price is your top factor, then Parcel Select / Ground is your best bet. Because this is the cheaper option delivery times tend to take longer. Usually when shipping domestic your package will arrive within 2-8 days, but this isn't guaranteed. Also, packages being sent using this service have to be in your own Parcel/Box.
If your package would normally qualify for Cubic Pricing we recommend your customers to check their price using Priority Mail first, because sometimes Cubic Pricing even beats out Parcel Select / Ground while getting your package there faster.