Free Online Calculators
Body length or age → EU clothing size for babies
This calculator finds the right EU clothing size for your baby based on their body length or age. EU baby sizes are directly tied to body length in centimetres — for example, size 62 fits babies around 62 cm tall. Enter either measurement to get an instant, reliable size recommendation.
Yes, most babies at that weight fit into 0-3 month clothing, though it will look roomy at first. If you want a snug fit for the first weeks, newborn size is the better start.
A "6 months" label almost always means the upper limit, so it covers roughly the 3-6 month range and fits until the baby turns six months. Brands that mean the older range write it as 6-9 or 6-12 months.
They are close in length but cut differently: 24 months is shaped for a diapered baby with a wider seat, while 2T is slimmer and made for a walking, potty-learning toddler. Many toddlers wear both at the same time depending on the brand.
Measure your baby's height and weight and compare them with the brand's size chart instead of going by age alone. Age labels are only averages, so a tall or heavy baby often needs the next size up.
Usually yes — many brands label the same garment either "3 months" or "0-3 months", meaning it fits up to the third month. A few labels use "3 months" as the start of the next range, so check the chart in centimetres or inches.
Growth slows down after the first year, so manufacturers widen the steps between sizes. In the first months a baby gains length quickly, which is why those sizes change every three months.
Yes, 2T is normally too big for a one-year-old, since it is cut for a child around two years old. Only very tall or heavy toddlers fit it that early.
No, 3T is clearly larger — it is meant for a child around three years old, while 18 months covers the toddler year and a half. Between them sit the 24 month and 2T sizes.
Buying one size up is usually the smarter choice, because babies outgrow clothes faster than they wear them out. The exception is sleepwear and bodysuits, which should fit properly for safety and comfort.
Shopping for baby clothes can be surprisingly tricky. Babies grow at different rates, size labels vary between brands, and buying the wrong size means returns, frustration, and wasted money. Our free Baby Clothing Size Calculator takes the guesswork out of the equation. Simply enter your baby's body length in centimeters or their age in months, and instantly get the correct European (EU) clothing size.
The calculator is designed to be as straightforward as possible. You have two options for input:
The result is displayed as a standard EU baby clothing size (e.g., 56, 62, 68), which is used widely across Europe and by most major international baby clothing brands.
Unlike adult clothing sizes that use chest or waist measurements, EU baby clothing sizes are based directly on the child's body length in centimeters. A size 62 garment, for instance, is designed for a baby who is approximately 62 cm tall. This makes the system intuitive and easy to use once you understand it.
The reason body length is used rather than age is simple: babies of the same age can differ significantly in size. A three-month-old might measure anywhere from 55 to 65 cm depending on genetics, birth weight, and feeding. Using body length as the primary metric ensures a much better fit.
Online shopping for baby clothes is convenient, but without knowing the exact size, you risk ordering the wrong item. Before placing your order, measure your baby and use the calculator to confirm the correct EU size. This simple step can save you the hassle of returns and ensure your baby gets a comfortable, well-fitting outfit.
If you want to buy a clothing gift for someone else's baby, ask the parents for their child's current body length or age in months. Plug that information into the calculator, and you'll have a reliable size recommendation in seconds. Many parents appreciate receiving clothes in a size slightly larger than current, so their baby can grow into them.
Traveling and want to pick up some cute outfits for your little one? Many countries outside Europe use different sizing systems (US, UK, Japan). Our calculator outputs EU sizes, which are the standard in most European countries, helping you navigate sizing differences confidently.
Getting an accurate body length measurement is key to using the calculator effectively. Here are a few tips:
Keep in mind that babies tend to curl their legs, so patience is key. Early morning measurements right after a diaper change are often easiest.
EU size 62 means the garment is designed for a baby with a body length of approximately 62 centimeters. This is typically equivalent to a baby between 3 and 6 months of age, though individual growth rates vary significantly.
In many cases, yes. Babies grow quickly, and clothing that fits perfectly today may be too small within a few weeks. Buying one size up gives your baby more time to wear the garment. However, avoid going too large, as overly baggy clothing can be uncomfortable and even unsafe.
Yes. Because the calculator is based on body length rather than age, it works well for premature babies. Just enter their actual body length and the calculator will return the correct EU size. Note that specialized premature baby clothing (sizes 40, 44, 48) may also be available for very small babies.
Yes, the EU baby clothing size system based on body length in centimeters is used consistently across Germany, France, Italy, Spain, the Netherlands, and most other European countries. It is also adopted by many international clothing brands.
During the first year of life, it's a good idea to recalculate every 4 to 6 weeks, as babies grow very quickly. After the first birthday, growth slows slightly, so checking every 2 to 3 months is usually sufficient.