Take one pair of pyjama bottoms ...

• A good sharp scissors
• A sewing machine
• A little bit of imagination 

and voila - two lovely cushion covers 

(just one in the pic, sorry!)

and what makes it even better is the lovely trimming at the bottom of the pjs just finishes off the cushion perfectly ...

 All I did was:

• turn the pyjamas inside out 
• cut the bottom parts of the legs off (used an existing cushion to measure against)
• Sewed the bottom seam
• Turned right side out
• Inserted cushion
• Added one button to the open end and stitched it together using the button