Blimey Gee, thats a pretty nifty comment! I'll go and stick that marker on the scale..!!Limit for many Royal Mail international options (Airmail/Airsure) is 2kg, so try to keep parcel under that weight if possible. 2kg will cost £11.60 + £4.90 if you want it tracked and insured to Europe.
http://www.royalmail.com/portal/rm/content1?catId=400036&mediaId=53800712