Bibury is a curtain and upholstery fabric that is available in a wide range of gorgeous colours.
This soft to touch plain fabric is a versatile choice that can be used on many projects. Add a decorative touch to your boat, keep heating costs down and help to keep out draughts with these custom made Porthole Bungs. 
 
With or without contrasting/coordinating piping (on front edge only), please state preference in "options" field. If no colour stated a contrast piping will be applied.
Backed with waterproof faux leather
Fitted with a zip to allow the covers to be removed
Foam depth 4cm
 
How to measure for Round Porthole Bungs
 
Measure your window from edge to edge of the wooden trim on the inside (see last picture).  The bung is designed to fit snugly in the gap to prevent draughts.  The depth of the foam is 4cm.