According to the Royal Mail Group, second-class stamp prices vary depending on their purpose. As of July 2014, a second-class stamp for a letter is 53 pence, and second-class postage for a large letter starts at 73 pence, small parcels start at ?2.80 and medium parcels start at ?5.20.
While these prices are the starting prices for these stamps, the weight of the parcel and whether the parcel is traveling domestic, international or military affects the cost of the stamp. The Royal Mail Group provides online calculators to determine the price of postage for each package. The stamps can be purchased online, by phone or at a post office branch.