Pretty easy google,
standard is 5/64 low E, 4/64 high E measured own at 12th fret
at first fret open string just clears the fret as you don’t want it to buzz
that capo fret 1, hold 17th down, this creates a ‘straight edge’
measure at 7th fret 4thou to 8thou
hint standard paper is 4thou thick and 8 folded over,
a standard business card is 12thou
make sure gap st 7th fret is 1 to 2 pieces of paper