Sail Area Of Class Spinnaker

Does anyone know the sail area of the class spinnaker?  

I read through old forum posts and they indicate that the brochure states 670 sq.ft. , "but that number is incorrect".   Nowhere in the post does anyone indicate the actual number.

I need this for my PHRF certificate.  

Any help is appreciated.

Thanks,

Jamie

Unfortunately, I do not have access to my class spinnaker right now.  I was hoping that someone could tell me how the OD spinnakers are sized.  I have a Doyle spinnaker sold by the Montreal loft back in 2009 or 2010.  

I know that I have a class OD spinnaker as I have seen pictures of my boat sailing in previous Nationals using this spinnaker.

Thanks.

I see the class rules state: 

Formula:

SF x SL/ 2 + 2(SMG - SF/ 2) SL/ 3.   I have no idea what the SMG is.... 

where: 

SF = Width of foot; measured round the edge of the sail between the lowest point on the leeches. 

SL = Leech length, measured round the edge of the sail from the highest point on the sail at the head to the lowest point of the sail on the leech. If the two are not equal, SL shall be the mean of the two leech lengths. 

SMG = Width at half height; shall be taken as twice the distance between the mid-point of the leech shall be determined by measuring round the edge of the sail half the length of the leech from the head.