The gratings are custom fitted to the
boat. Thus you have a lot hands on shaping of the
wood.
But gratings do help keep your feet dry, by allowing the
water that board the
boat to run off faster and you don't need waders to get around in the
cockpit.
IF you find a grating that is too large for your boat, you can always trim it down to size and have it looking good.
But unfortunately there are no
wood stretching machines that can make boards longer. So if you find one that is too small. Let someone else purcase it.