They came like this short. If you even wanna go shorter, you can trim via a pre designed line. Go to pep boys and look for the pro-fit I believe. Get the #8 style flaps. BIRDMAN did a write up with the same brand but his are the #7 style flaps which are the longer of the two.
In the package with the mud flaps, you will see theres a templet which you can put up to the liner and do the fold trick and then cut along the folded lines to get your exact lay out to trimming your flaps. I then used some binder clips to hold the flaps on in the desired position snugged up for a better fit. I Used 3-4 clips and they held strong enough to drill a pilot hole and use the supplied screws ONE HANDED without any issues. I used the supplied hardware. Some opt for SS screws but in my opinion they stick out like a sore thumb , and the screws are more than likely painted galvanized. I'm sure the manufacturers won't just send crap hardware on an item that they know will be in wet applications.
Here's how I mounted mine.....
The way I have them mounted, I can remove and insert the plastic push style screws and it's back stock looking without any holes. The holes I drilled then screwed the flaps, I matched with the stock fender liner plastic screws. If I decide to take off at a later date, still look OEM.
'12 Race Red Raptor SCAB (Loaded to the max!)
SCABS are faster!!
'08 SeaDoo RXP-X Clockin' 80+ GPS