Sad state of affairs that we now have to resort to vacuum packing just to save on postage, should we be a mm over the 20mm allowance.    Most overseas postal services specifically cater for 250g parcels, not like AP who bundle and charge it all under the 500g umbrella.    How many times have you sent a tiny item in this ridiculously large 500g satchel just because it's thicker than 20mm....