I have just sold two singe bedding sets. The parcel is just over the 2kg for a small parcel which was recommended on the simple delivery (Royal Mail). I tried to edit the size of the parcel (that's a con when Ebay don't offer up to 5kg) before printing the label but I'm not sure it happened as I expected to pay more postage but it's not showing on my account. Is there any way I can tell or can I just pay the extra postage at the Post Office?