5.5 inch Generic Hatch Cover

I needed a new hatch cover on the back of my 10ft Perception Sport Pescador kayak, I wasn’t sure if I needed a 6inch or a 5.5 inch because when I measured the hatch it was right in between, so I decided to get the 5.5 inch cover and it worked perfect! Nice and tight so I don’t have to work about anything coming out of it in case I flip over..