the Platinum weave is similar to the gold weave of other brands, it is heavier than single but not as thick as double, it is not too heavy but very durable. My first Gi was a judo double weave and that thing was killing me off, such a heavy sucker.
I am 5'9" & 220pounds, I have an A4 size wich is perfect for my length & girth, the sleaves i had shortened by 2". The pants fit my 38" waist & I could prob gain a another inch or two and they'll still fit well, they are a nice durable canvas with reinforced knees and an excellent tying system, some of the gi's I've seen come with a nice top but crappy lightweight pants, length wise the trou touch the top of my foot. THERE IS VERY LITTLE SHRINKAGE on gi top (I am inclined to say there is none at all), and I was able to shrink pant length by 1/2" only.
My advice re sizing is to talk to the supplier and keep copy of email, if
they recommend wrong size you may have leverege for redress if you want a size up/down. Dont go past Boomer at
http://cagesidemma.com/gis.html , be sure to check him out and compare to others, I can say his international freight was super cheap & super quick plus he threw in a free belt for me.
Excellent equipment will help promote excellent performance. All the best for your search.