Posting items overseas - blooming expensive!

[monkeychoo]

Im not sure if this is a stupid question or not, or if its in the right section, but here goes:
Im starting up my own online business and trying to work out the postage for sending items overseas. I have the Royal Mails international charges for the relevant zones, but see that they only ship up to 2kg overseas. What happens if I go over 2 kilos? Ive checked out UPS and DHL, but their charges are a giant leap from what the Royal Mail charge. Do I have to bite the bullet and charge my customers extortionate fees for anything over 2kg? Or maybe refuse to ship anything over that amount. Can anyone help, this is confusing and now I have a headache.

[Fitzer]

Royal Mail are now only the letter post people, you want Parcel Force for anything bigger, most destinations up to 30kg, still quite pricey mind you. Their website has a calculator and list of tariffs to download www.parcelforce.co.uk