My usual hairstylist had recommended the Euronext Remy 18 inch Clip-In Hair Extensions from Sally Beauty and she used them this past Saturday for my hair trial. I highly recommend them to any bride looking to add a little volume/length to their hair! My hair is already pretty long, but it added something extra for the half up/half down style I wanted her to do. The are real human hair and can be curled, washed, etc., plus they match my hair color exactly and just clip-in. They were around $90, but well worth the money! I sound like a commercial for them lol, but they really worked out great!
ps- Your hair trial looks great! You are going to be gorgeous on your big day :)