There are restrictions on the site as well
Small Parcel
Parcel
Not sure?
Small Parcel
Minimum size: One surface must be at least 9cm x 14cm.
Maximum size: The combined length + width + depth must be no more than 90cm with no single side longer than 60cm
Maximum weight: 2kg
If your item is larger or heavier than the above, it should be sent as a Parcel
Tubes
Minimum size: Length plus 2 x diameter should be at least 17cm, with the length no shorter than 10cm
Maximum size: Length plus 2 x diameter should be no greater than 104cm, with the length no greater than 90cm
Maximum weight: 2kg