Regular Width, White Barreda Mary Jane Flat Shoe - adidas

Stand barefoot with a straight posture.
Regular - For women 5' 4"" - 5' 7""
Petite - For women 5' 4"" and under - Pant inseam is 3"" shorter than regular.
Tall - For women 5' 7"" and taller - Pant inseam is 2"" longer than regular.

Keeping the tape measure comfortably loose, measure around the smallest area of your waist.

With feet together, keeping the tape measure comfortably loose, wrap the tape measure around the fullest part of the hips.

Stand with your shoes on and measure from the crotch to the bottom of the shoe.

Remove shoes and socks, stand on a sheet of paper with feet comfortably aligned to each other at approximately shoulder width apart, and have your body weight evenly distributed between your feet.
Using a pencil, gently trace the outline of the foot onto the paper, ensure the pencil is kept vertical. The trace will be more accurately done by someone else.
Draw a straight line at the longest toe and at the heel, these two lines must be parallel of each other.
Draw a vertical line connecting these two parallel lines. This right angle (90 degree) is your foot length.
The foot width is measured by a straight line connecting the widest spot of your foot.
If your measurements fall between two sizes, move up to the larger size for a better fit.