Spanish Wedding Expressions Spanish Wedding?

Spanish wedding? - spanish wedding expressions

OK, I was at the wedding of my cousin in Texas in a few days, and I do not know .... so what use is appropriate
Flowerdy is a dress, pink and white ... Which a rope and lower ....
My friend is Dominican, said that the Spanish women's wedding at the age of wearing robes, and young women wear short skirts ..... The problem is, my dress falls above the knee ....
If this is the thing to wear? and if not, what do I look?