If you change your mind about more than a few small details once the project has started, expect to renegotiate the contract, time schedule, and price for these changes. Do speak up! You’re not expected to stand silently by while the dressmaker does what she wants. She needs to hear your thoughts and concerns, and will work with you to get the best possible results. But don't keep doing it or the dressmaker may cancel the contract, charge you for work and materials used so far, and you will have only yourself to blame. Your contract will state how many changes are allowed before additional fees are incurred.