I think Mary is absolutely spot on here.

In all the sail measurements I've seen over the years it is not uncommon at all to see the sails cut 0.05 sq. mtr to small by sailmakers. They often do this to not have their sails made uncompliant by a measuring official who pulls harder on a measuring tapes then his collegues. And to allow for some stretching of the sail over time.

Most sailmakers try to end up at 0.03 sq. mtr. smaller the absolute limit. I think many may find that the SL 16 jib will actually measure in under F16 rules if the sail is measured when absolutely new.

I have seen alot of jibs that were between 0.05 and 0.15 sq. mtr. smaller then the absolute limit. There were even a few that were no less then 0.30 sq.mtr. smaller (some sailmakers can't read measuring tapes properly themselfs.)

So indeed while technically some are correct that 3.75 sq. mtr. jib is not a 3.70 sq. mtr. jib I think we may find that 3/4 of the SL16's measure in as F16's just the same.

Wouter