Getting More Space Out of a Flat Rate Envelope

Can you turn a flat rate envelope into a pouch to increase the capacity? It holds more than a small flat rate box ($5.80) and about as much as a medium ($12.35) for only $5.60. So worth it! I do this all the time! Just fold the bottom both ways, and flatten it out from the inside, folding the corners and taping them up into a rectangular bottom. Secure with lots of tape. Happy shipping!
image from

I saw this tip on pinterest. Here in Hawaii we use a lot of flat rate mailing boxes (regular packages take three weeks by boat), so any ideas to get more use out of these things is appreciated.


My oldest daughter just went back to the mainland after Christmas and she (of course) left a few things that she wants back IMMEDIATELY.

I tried to stuff the three things (one shirt and two computer games) into a small flat rate box.

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No dice.

So I pulled up the photo on top from pinterest and made a pouch.

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The instructions (by which I mean the pictured steps–there was no link to this image) were not too difficult, and everything fit in pretty well.

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The real question is: Will the post office accept this weird lumpy thing?

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I’m going to find out tomorrow… STAY TUNED!!!

UPDATE: 7 January 2014

SUCCESS!!! The post office clerk accepted the pouch without question!

After I waited in line for half an hour.

2 thoughts on “Getting More Space Out of a Flat Rate Envelope

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