For my wedding dress I measure inbetween sizes. So my bust and hips had me at a size 10....and my waist has me at a 12. I'm a pretty average size girl, normally wear about 6/8 in pants. They suggested I go with the 12. But now I am scared it will be to big and I will have to pay a lot to get it altered. BUT then it would be horrible if the dress was to small. whats a girl to do???