Note that not only the size but also for completeness. Narrow shoes can give you a lot of unpleasant moments, but too broad to be very uncomfortable. Please note that you will hardly have time to carry shoes before the wedding - so choose the model that you will be immediately on the leg.
Rate the height of the heel. There are girls who are quite comfortable feel to the extreme high heels. If you are not one of them, choose a quieter model. If you still want to add to his stature without sacrificing convenience, buy shoes with hidden platform - they are completely painless add you to a couple of centimeters. It is not only the height, width and heels. The thinner the hairpin, the more difficult to maintain balance and the more tired legs. Worst case - high wedge heel. But straight stud moderate thickness can be quite convenient.
The best choice - a model of soft leather. Bend shoe or sandal. What would be a more flexible sole, the easier it will be your gait. And in shoes with rigid molded block you will feel fatigue and pain in the legs in half an hour.
Think before you choose sandals with many interwoven on the rise and ankle straps. They can look very elegant, but differ unpleasant feature - a couple of hours thin straps begin mercilessly cut into the skin. It is unlikely that you will be able to spend in these shoes all day.
If you bought pumps, add their anatomical footbed suitable size - with her new shoes will be much more convenient. It will not hurt and a pair of silicone gasket under the toes and heels, if the shoes will rub the feet, these simple additions you help out.