Start by measuring your pillows. My ones were the basic ones from Ikea that measured 60cm x 38cm.
Make a paper template to the dimensions of the pillow.
Draw around your template on to your fabric.
Cut out two rectangles of your covering fabric (I used a quilted star patterned fabric) and two rectangles of lining fabric (I used a silky dark blue).
Cut out two more half rectangles (30cm x 38cm) of the lining fabric.
Now make a paper template for your cross. This should be 60cm wide and 38cm tall to match your pillows and about 7cm thick.
Trace around the cross on to your fabric (I used a silky pink).
Cut two crosses out. Put these to the side for the moment.
I also ironed on some interfacing to the back of my crosses to make the colour thicker.
Lay down your cover fabric and place the paper cross template on top.
Lay down two strips of different width ribbon from the corners in to the centre of the cross and cut to size. Remember to refer to the photo of the union jack to get the ribbons the right way around. Pin in place.
Place a strip of contrasting fabric on top. Pin in place.
Remove the paper template and place the silk cross in it's place. Pin in place.
Cut more ribbon to place around the edges of the cross and pin in place.
Sew around the edges of the ribbons.
Change the thread colour to match the ribbon.
Stitch up both of your union jacks and put to the side.
Take your half rectangle of lining fabric and fold over one of the wider rough edges.
Stitch in place neatly.
Place on top of your cover and pin the top edges together. You want the stitched side to be facing out.
Sew on to the cover along the pinned edge.
Now fold over one of the short edges on the larger lining rectangle and sew along the edge.
Pin on top of the cover, you want the stitched edge to be at the top, where the shorter rectangle is also stitched.
Sew along all the sides apart from the top, already stitched edge.
Fold inside out and that's your pillowcases finished.
Pop in your pillows and put on your bed. Sweet dreams!