An initially strange convention in packaging allows manufactures to deliver up to plus/minus 10% on the contract quantity and invoice for the actual amount delivered. Whilst superficially this is a shoddy practice, there are good reasons: it avoids waste. Carrierbags are printed from a reel of paper or poly, initially by weight. After they are printed they are "converted" into carrierbags, at which time they are machine counted and placed by machine into swatches of 50, 100 etc. At the initial weighing stage, the amount of reel used in setting up to good print is an unknown. If the set up to good print is rapid, it would be extremely wasteful to scrap good print. Likewise, it would be uneconomical to set up the press again for a small underun. Most carrierbags are used by retailers who are using carrierbags all the time, so up to +/-10% is not an issue, and they gain from waste saving and efficiency which is ultimately passed on in a free market, and an extremely price conscious industry. Obviously this does not apply to unbranded carrierbags which we stock and pick to your order