I know its a little late for a white blazer, according to some of the old rules, (no white after Labor day) of which I don't really follow. I have been wanting a white blazer since the beginning of summer and I was asked to make one for a good friend's mother. After hers was completed I started on mine.
That was back in July. I finally finished it. This is the pattern I used. It is out of print but very basic.
My adjustments were for my full bust. I also shortened the sleeves even though they are rolled right now. When my sleeve are down,they are the perfect length.
I think its a good fit and will be made again with a different pocket style or some other design change.