Step by Step Guide to Measuring Your Feet
1. All you need to get your proper foot measurement at home is:

a piece of paper larger than your foot
a pencil
tape
and a ruler or measuring tape.
Tape the paper down to the floor.
2.
Sit with your foot firmly on the floor, and your leg bent slightly forward.
Trace the outline of your foot and remember to measure your foot without shoes.
Hold the pencil or pen upright and perpendicular to the paper. Do not hold it at an angle.
Make sure the pencil is resting snugly against your foot as you draw around it.      
3. Use your pencil to draw straight lines touching the outermost points at the top, bottom,
and both sides of the outline.
4. Use your ruler or measuring tape to measure the length from the bottom line to the    
    top line that you drew in step three.

Be sure to hold the measuring tape straight, and find the closest mark that you can,
don't round up or down dramatically (for inches, use the closest 16th mark).
5. Many people will need a narrow or wide shoe. This step will help you to determine the
width of your foot. (SEE THE CHART BELOW)

Measure the width of your foot by using your measuring tape or ruler to measure from
the line on one side of your tracing, to the line on the other side.

Again, be certain to find the closest mark (for inches, use the closest 16th mark).
Finding the Final Shoe Size
Repeat these steps for your other foot, and use the larger of the two.

After you have your numbers written down, you'll want to subtract 2 tenths of an inch from the numbers. This is to
accomodate for the slight space between your actual foot and the line made by the pencil.

These final numbers are your actual foot measurements.
Women's US Sizes / Widths:
US Size
Narrow
Standard
Wide
Extra Wide
5
2.81
3.19
3.56
3.94
5.5
2.88
3.25
3.63
4
6
2.94
3.31
3.69
4.06
6.5
3
3.38
3.75
4.13
7
3.06
3.44
3.81
4.19
7.5
3.13
3.5
3.88
4.25
8
3.19
3.56
3.94
4.31
8.5
3.25
3.63
4
4.38
9
3.31
3.69
4.06
4.44
9.5
3.38
3.75
4.13
4.5
10
3.44
3.81
4.19
4.56
10.5
3.5
3.88
4.25
4.63
11
3.56
3.94
4.31
4.69
11.5
3.63
4
4.38
4.75
12
3.69
4.06
4.44
4.81
12.5
3.75
4.13
4.5
4.88
13
3.81
4.19
4.56
4.94
13.5
3.88
4.25
4.63
5
14
3.94
4.31
4.69
5.06
Color de Flamenco