SloggersSloggers cut-to-fit "Half-Sizer" fit adjusting Insole - Style 330BK

I bought a size 10 since i wear a 9 1/2. in reading these questions do i cut the insert where it says 10? or do i cut it at 9. i read “literally”

Can this replace the original insole

Do the inserts go up to a size 12. I can't seem to get an answer. Thanks

Do the inserts have arch support?