We're going to make a frame that is 2.5 cm (1 inch) wide and 2 cm (6/16 inch) deep. I'm sorry, but you'll have to use a ruler with metric system units for this project.

Step 1: Preparing a paper rectangle

Measure the artwork to frame, add 10.5 cm at each side and cut out a rectangle of the dimensions you've calculated. Use heavyweight (240 gsm) cardstock paper.

Step 2: Drafting

Use one of the following methods to draw the lines: print out the template, cut it out and transfer onto the piece of cardstock you've prepared; alternatively, you may just draw the lines with a pencil according to the diagram above.

Notice that the corners are marked "top right", "bottom left" etc. Line up a cutout with a corresponding corner of the rectangle. Transfer the lines by pressing them into the paper, using a needle, or tracing the template around like shown in the photo. Using a pencil, mark with dots the points where the creases start.

After repeating the procedure for all the four corners, connect the dots with lines that go along the paper edges.

Step 3: The cutout

Carefully cut away the corners. Score the cardstock according to the crease lines and fold like shown below.

Step 3: Assembling

Start assembling the frame. If you don't use the back of the frame as a background, glue your picture down to the frame at this point. Then fold the border like shown in the pictures, simultaneously inserting the sides of a corner into each other.