Heres just a few ways on how to wear a white blazer, I will be uploading some more pictures if myself wearing a white blazer very soon.
My preference is to go for the slight edgy option like Chloë Sevigny.
Gwyneth Paltrows look I feel will work well with the daytime white blazer. The light blue denim jeans add a softer look, minimal make up makes this work...too much and it could end up looking trashy.
Whilst I already admire Whitney Ports individual style, I am so in love with this outfit, I really like the contrasting collar and the long boyfriend fit of the blazer, showing off those fantastic long legs, think its time I got a tan, this look really shows it off. The Blazer is from her own collection.