How to Find the Right Dress Size for Your Daughter
Every parent has been there: you order what looks like the perfect dress, it arrives, and it is either too snug around the shoulders or dragging on the floor. Figuring out the right dress size for a growing girl can feel like a guessing game, especially online. The good news? It doesn't have to be.
At Deux par Deux, we design girls' clothing for sizes 2 to 14, and we've learned a thing or two about what makes sizing actually work. Here's everything you need to know to shop smarter and skip the returns.
Why Age-Based Sizing Doesn't Always Work
Most parents start with age as a reference point, and that makes sense. But children grow at wildly different rates. A 6-year-old can easily fit into a size 7 or still be comfortable in a 5. Two kids the same age can be centimetres apart in height and have completely different proportions.
This is why we always recommend going beyond the age label and taking a few quick measurements instead. It takes two minutes and saves a lot of back-and-forth.
How to Measure Your Daughter for a Dress
For dresses in particular, three measurements matter most:
- Height: Have her stand straight against a wall, without shoes. Measure from the top of her head to the floor.
- Chest: Wrap a soft measuring tape around the fullest part of her chest, keeping it level. Don't pull it too tight.
- Waist: Measure around her natural waistline, just above the belly button, relaxed.
For dresses with a skirt, height is especially important because it determines overall length. A dress that fits perfectly in the chest may still be too short or too long if height isn't factored in.
Once you have those numbers, compare them to the brand's size chart. At Deux par Deux, our size guide includes detailed measurements for each size, so you can cross-reference quickly.
Understanding How Girls' Dress Sizes Are Structured
Numeric Sizing (2 to 14)
In children's clothing, numeric sizes generally correspond to age ranges, but they're really built around height and weight averages. Here's a rough overview:
- Size 2–3: Approx. 92–100 cm tall
- Size 4–5: Approx. 100–112 cm tall
- Size 6–7: Approx. 112–122 cm tall
- Size 8–10: Approx. 122–140 cm tall
- Size 12–14: Approx. 140–158 cm tall
These are general guidelines, so always cross-check with the specific brand's chart. According to the Canadian Paediatric Society, children's growth patterns vary significantly from one child to the next, which is exactly why measurements are more reliable than age alone.
Dress Style Also Affects the Fit
Not all dresses fit the same way, even in the same size. A few things to keep in mind:
- Fitted bodices (like those with a defined waist seam) require a more precise chest and waist measurement.
- A-line and shift styles tend to be more forgiving in the torso and work well if your daughter is between two sizes.
- Tiered or mesh skirts don't add bulk to the bodice, so sizing stays consistent with the chart.
Our girls' casual dresses tend to have relaxed, easy-to-wear cuts, great for everyday sizing without overthinking. For birthdays, holidays, or special events, our girls' special occasion dresses are designed with a true-to-size fit, so taking accurate measurements matters a little more.
What to Do When She's Between Two Sizes
This is probably the most common sizing scenario. Here's how to decide:
- If the difference is mainly in height or dress length, go up a size; you can always adjust or tuck, but you can't add length.
- If the difference is mainly in the chest or waist, choose based on the measurement that's harder to adjust. For dresses with a defined waist, the waist measurement usually wins.
- If she's in a growth spurt and you're buying ahead for an event a few months away, sizing up is almost always the right call.
One thing we love about many styles in our girls' dress collection is that they're cut with a bit of room for movement and growth, because kids are not known for standing still.
Tips for Shopping Dresses Online
Online shopping for kids' clothing is convenient, but it comes with a few specific challenges. Here's what helps:
- Always check the brand's specific size chart, not a generic one. Sizing standards differ between brands, a size 8 at one label may be cut differently than a size 8 at another.
- Read customer reviews for fit notes. If multiple parents mention "runs small" or "very generous in the shoulders," that's useful intel.
- Update her measurements every few months, especially around ages 3 to 7 when growth spurts are more frequent and less predictable.
- Note the fabric content, natural fibres like cotton can shrink slightly after washing, which affects fit over time.
At Deux par Deux, our product pages include fit notes directly (for example, "fits true to size") to help you shop with confidence. And if it's still not right, free returns within 30 days have you covered.
One Last Thing: Let Her Be Part of It
If your daughter is old enough, involve her in the process. Ask her whether she prefers a looser or more fitted feel. Some girls love a twirly skirt with volume; others want something streamlined for easier movement. Knowing her preferences helps you pick not just the right size, but the right style, and a dress she'll actually want to wear.
Finding the perfect fit is part practical, part knowing your kid. With the right measurements and a size chart in hand, you're already most of the way there.