smallest sail i have heard used by adults is 3.x
the largest is 12.x
so, 7.5 is smack in the middle
at 100 kilos/220 lbs i started with a 7-oh cambered sail
now my largest sail is 10-oh {cambered obviously}
cambered sails are a bit odd
they feel heavy when there is not enough wind
and they pull like heck when the winds pick up
i still prefer cambered over RAF in 7-oh and larger
the newer sails are easier to rig than back when i started
depending on your weight, a cambered 7.5 can be light or mid winds
i can uphaul my 10-oh, butt prefer to use my EZ uphaul for that
perhaps you can consider that as well
i no longer have any issues uphauling 8-oh
as they said - once you drop the smaller sail less often - GO FOR the cambered 7.5
if there are only 2 cambers like a free-race it is NOT that different from a RAF
no matter what - get on the water TOW and have FUN
joewindsurfer.com