To make a custom sized envelope from a paper bag you will need:
> A paper bag
> Something that needs an envelope:
a card, letter, document, picture, anything flat that needs protection or mailing
> An iron
Select a paper bag
Pull it apart where the glue seams are
Keep the useful part. Throw away what you don't need
Choose a card or some other item that needs an envelope.
Most likely, the paper bag will have advertising of some sort printed on it.
Use the plain side of the paper bag for the outside of your envelope.
The printed side can be the inconspicuous lining of the envelope.
No measuring needed.
Fold the bottom edge of the paper up, so that the top edge of your card shows a little.
Cut excess paper.
You will "wrap" your card.
No need to fight with too much paper.
Fold the top edge down to hide the card, making sure to overlap the bottom edge.
Be careful not to crease the card inside.
Take the card out of its wrap.
Put the card on top of the folded paper.
Cut the excess.
Leave an inch or so on each side of the card, right and left.
Be careful not to cut the card !!!
Fold the edges so they "hug" the card.
Be careful not to bend the card with these "hugging" flaps.
Set the card aside for now.
Make complete cuts at the 4 corners. Slant the cuts 45 degrees or so.
Start each cut at a fold, but don't cut the fold itself.
Making these cuts results in v-shapes when unfolded.
Flip the envelope form over so the plain side shows.
Cut near the fold, at a slight angle, toward the v-shaped cut.
Make 4 complete cuts, 2 at the top, 2 at the bottom.
Iron out the resulting envelope form.
It will look a whole lot better.
Fold the lower flap under.
Fold the upper flap under.
Flip it over.
Fold the "hugging" flaps inward.
Put dots of glue on the "hugging" flaps close to their edges.
Dot from the bottom, up to the level of the overlapping top edge.
Release the top and bottom edges from the "hugging" sides.
Press the lower flap on the dots of glue.
Hold it a few moments to insure a secure bond
Put the card in the envelope.
Participated in the
Papercraft Contest 2017