I got a new Toy.
The WRMK Envelope Punch and Score Board.
Yes it's Brilliant.
For this your going to just score NOT Punch.
10.5 cm by 10.5 cm Cardstock.
From a A4 Piece of card you can make two boxes.
Line the corner of your cardstock at the 1 1/2" mark on the board, it's in Inches on the board, so this is why you get this measurement not cm.
Score from all 4 corners do not punch.
Using in the scorelines lined up with the pointer score the next 4 lines.
Lay your scored piece of card flat and fold the triangle down, crease, now fold on the next score line, inwards you will have 4 thicknesses of cardstock,
Open flat, and repeat for the other 4 triangles.
Make your cuts as in the picture above,
Fold the sections on the right and left
bringing up the sides of your box.
Fold the top and bottom to make the box.
Now measure the size of your box, and cut a square to this size and place inside the box.
This will secure the box.
Repeat this for the other section of the box,
but use the 1 5/8" Mark.