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How to Determine your Dress Size

Dress Sizing Tips:

1) Each dress is made differently, so please check the size chart on the dress page that you are looking at for accurate sizing information.

2) Keep in mind you will always want to allow time for alterations for the best fit.

3) When choosing between sizes you will need to consider your largest measurement and the silhouette (shape of the dress). Formal Gowns do not have seam allowance and are unable to be let out. When in doubt choose the larger of two sizes so that your dress can be altered smaller to fit you. 

4) You will need a Measuring Tape: For the most accurate estimate use a flexible measuring tape. A possible workaround if you do not have access to this sewing tool is to use string to measure yourself, then determine the length of the string using a ruler or self-retracting metal measuring tape. Make sure to keep the tape level!

5) What to Wear: Have someone else take your bust, waist, and hip measurements when you are wearing a form-fitting layer over the undergarments you think you will wear with your prom dress.

6) The Measurements:

  • Bust: This is not your bra size number. The bust measurement is taken at the fullest part of your chest, while the bra-size number comes from the measurement just below the bustline. For dress sizing, be sure to measure across the fullest part of your bust instead of relying on your bra size.

  • Waist: This is considered the smallest part of your body between bust and hips, and it typically falls about 1 inch above your belly button. Make sure the measuring tape fits comfortably and isn't too snug or too loose.

  • Hips: Stand with your feet together, and measure around the fullest part of your body below the waist. Typically this will fall about 7 inches below the natural waistline.


7) Designer Size Charts: Every designer uses a different set of measurements for the same size, make sure you compare your measurements to the chart for the specific prom dress you are considering. It’s unusual to fall perfectly in line with a designer’s measurements. Generally, it is better to size up if your measurements fall across different sizes, as it is easier for a tailor to take in a dress than to let it out.

8) Cut & Fabric: The cut and fabric of the prom dress will impact fit. For example, if a dress is stretchy, the closer it matches your measurements, the snugger the fit. If a dress is a-line shaped, the flowing skirt provides more room in the hip area with a tighter fit in the waist and bust. Mermaid Dresses are tightest in the hips and tend to run smallest.

Why is Checking My Prom Dress Sizing Important?

Checking your prom dress sizing before making an online clothing purchase can eliminate the need to exchange your dress and save you money by minimizing the amount spent on shipping fees or prom dress alterations. Remember, every designer creates its own version of sizes (whether “small” and “large,” or number sizes like 2, 4, 6 or 16, 18, 20). This means that you might wear different sizes for different dresses, for example a size 10 for your first prom dress pick, but a size 12 for another formal dress!

 Rather than just ordering a size you typically wear, it’s best to measure first. Also, look closely at the style of the dress. If there are intricate designs, like complex beading or rows of sequins, it may be more difficult for a tailor to alter that part of the dress, making it important to match the size closest to your measurements.