Really depends on how much you want to spend. Strasberg Children in Willow Bend Mall has nicer, more traditional dresses (e.g., white/ivory with different-colored sashes). Nordstrom in Stonebriar Mall has some simple flower girl dresses that you can special order (over $100 each); if you apply for a Nordstrom card at the same time, however, you can at least get a % off the dress price. On the other end of the spectrum, if you want very inexpensive, though the material probably isn't as nice, try the Sam Moon plaza at the intersection of highways I-35 and 635, which has 2 bridal stores with flower girl dresses (and even those mini-tuxedos for ringbearers). good luck!