Saggy, uneven couch cushions are a natural part of an old, comfortable sofa.
That doesnt mean you cant spruce them up though.
The best part about this tip is that all you need are the buttons.
Instructables usersolobolays out how to spruce up your cushions:
Remove the cushion stuffing and lay the fabric flat.
Position the buttons evenly on the fabric.
Sew each set of buttons together, through the fabric of the cushion.
Add the stuffing back into the cushion.
Thats all there is to it.
A super simple fix, and the photo above shows you the before and after pretty clearly.
For step by step photos, hit the link below.
$1 Fix for Saggy Couch Cushions| Instructables