Netfloats are unique interlocking mats that cover the perimeter of your pond (where most predators strike), while leaving the centre free. They're less obtrusive than conventional pond netting & fit any shape pond. Join together with the twist ties provided, cutting where necessary to allow plants to grow through. 1 pack of 20 rings covers Approx. 3.5m (11') of pond perimeter when laid out 2 rings deep. Each ring measures 37cm (14½") x 32cm (12½")..... ..