Look for beauty salons or hair extensions shops in your area.
AiryHair.com
Celebrity Strands
abHair.com
BestHairBuy.com
HairExtensions.com
There's a site that offers affordable hair extensions in many colors and styles. I suggest you look or skim down this list of affordable hair extensions! http://www.sallybeauty.com/hair-extensions/Hair16,default,sc.html
For good quality extensions, expect to pay $200. GOOD human hair extensions are not cheap.
There are lots of online B2B portals from where you can get clip on hair extensions in bulk. As per my experience you can get the best and affordable deals of hair clip with https://www.tradewheel.com. The website offers you a massive range of quality products at affordable rates.
www.myspace.com/hottest_hair They are a cheap online hair extensions store.
Since you and your hair stylist know each other very well and must have a good relationship I feel as if they will give you a good price for hair extensions. However, you have to make sure that she evens does them. Many hair stylists aren't comfortable with doing them and she might point you in the right direction of the place that's reliable and affordable. Depending on your budget you can also go to Sally's Salon Care or any other hair specialty store and purchase your own clip in extensions. They are cheap and you are able to take them in and out whenever you choose.
I do know a good website with great prices plus good quality hair check out their website houseofbeautifulhair.com
If you are getting your sister hair extensions, I would not recommend randomly buying a set of extensions, and then presenting them to her. Good hair extensions need to be fitted to the person's head and hair color. Check out hairextensions.com.
A local salon is the best place to find hair extensions. Online retailers such as Best Hair Buy, Amazon, and eBay also each supply hair weave extensions.
EXTENSIONS or THE NEW EXTENSIONER
The actual hair extensions are 24 inches. If you are after an answer as to where the actual length will be once attached to your hair, then that would depend on how long your hair was in the first place.
At the moment yes, she does have really good thick hair without the extensions though, jealous much!!!
Clip hair extensions are just standard hair extension with clips sewn to the tracks. You can insert these to your hair, snap the clips in place and cover it up with the rest of your hair.