No matter what the reason is that you may need a wig, it can be really intimidating trying to by one that works for you. Natural looking wigs are only going to look so if the style, color, and fit are right for you. You may be nervous about picking the wrong real hair wigs and not looking your best, but choosing one isn't so hard once you have an idea of what works.
First you want to focus on fit. Wigs are often sold in various sizes and so you'll have to measure your head size to pick the right one. Take a measuring tape and wrap it around your head by the hairline, just above your ears. Take that measurement and see where it matches with size. If your head is 20 1/2 to 21 1/2 inches, your petite. 21 1/2 to 21 3/4 inches is average. 21 3/4 to 22 1/2 inches is average to large, and anything bigger is large.
Some wigs are one size fits most, with a stretchy net that can accommodate many. Of course, if you find that you fall into the very small or very large category, you can always see if custom made wigs would be a better option so everything fits well.
You need to take your face shape into consideration when picking the right cut and style of real hair wigs. If you have a round face, most styles will suit you. Hair brushed away from the face will make it look narrower and longer length wigs will elongate the face as well.
If you have an oval shaped face, consider yourself lucky. This is considered the perfect face shape and therefore you have the most versatility in your choice of quality wigs.
Heart shaped faces will look best in longer hair as incredibly short wigs may seem uneven with the balance of your face. Pear shaped are just the opposite shape and therefore want the opposite. Avoid long wigs but short styles will definitely compliment you and balance your forehead and jawline.
Square faces will want hair just past the chin or down the shoulder. Loose curls add a lot of volume and dimension so they are a great option. Triangular faces on the other hand, will want chin length or longer wigs and lots of volume so really widen the chin.
When it comes to color, the easiest choice is to pick what your natural hair color is, or something close to it. You can choose a color with highlights or low lights if you want something a bit different. But don't be afraid to try on colors that may be the opposite of what you are, so a blonde wig for a natural brunette and vice versa. Now is the time to really experiment with those other colors.