Question 1

What size am I in women's pants?

Accepted Answer

Measure your natural waist (narrowest point, about 1 inch above your belly button) and your inseam (crotch to ankle). Enter those two numbers into WhatSizeAmI and select your brand. The app tells you your exact size at that brand instantly — free, no signup required.

Question 2

Why do I wear different sizes at different stores?

Accepted Answer

Women's sizing is not standardized. Every brand sets its own size chart independently. A size 12 at Old Navy, a size 12 at Zara, and a size 12 at Express are all cut to different measurements. WhatSizeAmI accounts for each brand's actual sizing so you get the right size every time.

Question 3

What is junior sizing and how is it different from women's sizing?

Accepted Answer

Junior sizing uses odd numbers (1, 3, 5, 7, 9, 11, 13, 15, 17, 19) and runs 1 to 2 sizes smaller than women's even sizing. A junior size 15 is NOT the same as a women's size 15. Brands like No Boundaries, Celebrity Pink, Rainbow, and Rue21 use junior sizing. WhatSizeAmI converts junior sizing automatically.

Question 4

How do I measure my inseam?

Accepted Answer

Stand straight and measure from your crotch seam straight down the inside of your leg to your ankle bone. The easiest method is to measure the inseam of a pair of pants that already fit you perfectly — from the crotch seam to the bottom hem.

Question 5

Does WhatSizeAmI work for plus sizes?

Accepted Answer

Yes. WhatSizeAmI covers plus-size brands including Lane Bryant, Torrid, Walmart Terra and Sky, and extended sizes at Old Navy, American Eagle, Abercrombie, Athleta, and more. The app handles straight sizes, plus sizes, and junior sizing.

Question 6

Do I measure my waist differently for high rise vs low rise pants?

Accepted Answer

No. Always measure your natural waist — the narrowest part of your torso, about 1 inch above your belly button. Brands build rise into their size charts. What changes with rise is where the waistband sits on your body, not how you measure yourself.