Need an postage option for 2kg - 5kg
Add a small to medium parcel option.
There is a big gap for price from small parcel to medium parcel. I often have to send 2 small parcels because the items weigh just over 2kg. This looks unprofessional.
Keep the small parcel size but allow upto 3kg for say £4.95 - upto 4kg £5.95 - upto 5kg £6.95
I would use it all the time.