Premium Paper Roll Sandpaper 115mm Wide or 4.5 inches approx.
 
Sold by 1 metre lengths but you can buy longer. You can order as much as you want. This is a less expensive option than the cloth backed rolls but probably won't last as long for obvious reasons.
 
Just add the grit you need to the checkout and add quantities from the dropdown list.
 
Perfect for sanding all types of woodwork, just cut off enough to suit your needs.