You can choose paper of any colour and any type and texture you like. I chose a card paper in blue for this one.
This envelope will fit a card measuring 15 x 15cm. Notice that I added extra 1cm to the width and length so that there is enough room for the card.
Section B on the picture is the actual size of the envelope. So if your card is of a different size to mine just add 1cm each way to the size of your card and you have the measurements for your envelope. Sections A and C will fold over and will overlap; in this case by 4cm (12cm + 8 cm - 16cm). Again, if your card is of a different size to mine, you will have to readjust your measurements to allow for the overlap.
Lets do it...... :)
Draw the template of the envelope on the paper you selected. As A4 format of the paper was not big enough for the envelope, I joined 2 A4 card papers together using double sided tape.
Fold the sides in as on the picture.
Attach double sided tape to the sides marked on the template as D1 and D2.
How quick and easy was that?? :)