This is a picture of a letter sent to a customer (that they took) and had to pay a fee to get the item. The "letter" is under 50g and under 5mm (the compontents contained are 3.5mm accross the longest width) and I passed the item over the counter at the LPO. I measure the width after I package an item and the envolepe is flexible.

I had applied the stamps myself, which I will do more often as it is at least 20% cheaper (sometimes 50% cheaper) to buy stamps on the secondary market.

Does anyone see a problem with this?