Quick answer
Baby clothing sizing differs between brands because each company uses its own fit model, fabric blends, and shrinkage standards. Instead of relying on the age tag, always check the garment's actual measurements and compare them to your child's current size.
Why don't all baby brands use the same size chart?
There is no universal standard for baby clothing sizes. Each brand develops its own sizing based on the body proportions of their fit model, which can vary by region, target demographic, and design philosophy. A size 12 months from one brand may be cut for a taller, leaner baby, while another brand expects a shorter, rounder build. Fabric type also plays a role: knits with spandex stretch more than woven cottons, so a garment labeled the same size can feel tighter or looser depending on the material.
How do organic cotton garments affect fit?
Organic cotton garments, especially those that are GOTS-Certified, often use minimal chemical processing, which can result in less pre-shrinking. A 100% organic cotton sweater may shrink slightly more in the first wash than a synthetic blend, so some brands intentionally cut them a bit roomier. For example, Hope & Henry's Organic V-Neck Sweater with Elbow Patches is made from 100% GOTS-Certified Organic Cotton and features a classic fit that layers well over button-downs. If you're between sizes, the roomier cut of organic styles can be a factor to consider.
Organic V-Neck Sweater
What should I look for on a baby size chart?
A reliable baby size chart lists weight, height, and sometimes chest or waist measurements, not just age. Age ranges are rough averages: a 9-month-old who is tall for their age may need 12 months in one brand and 18 months in another. Look for the child's height in inches or centimeters first, then match it to the garment's body length. Also note the fabric content: a top with 5% spandex, like the Ruffle Neck Knit Top, will have more give than a rigid weave, which can affect the size you choose.
Why do some baby sweaters fit tighter than others?
Sweater fit depends on the knit gauge, yarn weight, and intended layering. A fine gauge sweater, like Hope & Henry's Organic V-Neck Sweater with Elbow Patches, is designed to be worn over a shirt, so it has a trimmer fit. A chunkier cable knit may be cut looser. Elbow patches and rib trim at the cuffs and hem also affect how the sweater sits on the body. If your child is between sizes, consider whether you plan to layer the sweater over a thick or thin top.
Frequently asked questions
Should I size up in organic baby clothes?
Not always, but it's common. Organic cotton garments without spandex may shrink more in the first wash, so some parents prefer to size up for a longer wear period. Check the care instructions and the garment's finished measurements before deciding. If the item is 100% organic cotton and you plan to machine dry it, consider one size up.
How do I measure my baby for clothing?
Use a soft measuring tape. Measure height from top of head to heel, chest around the fullest part, and waist at the belly button. Compare these numbers to the brand's size chart, not the age label. Height is the most reliable single measurement for baby tops and sweaters.
Why do some baby clothes have a 'slim' or 'classic' fit?
Brands use these terms to describe the intended silhouette. A slim fit follows the body more closely, while a classic fit allows room for movement and layering. Hope & Henry's sweaters are described as classic, meaning they have a traditional cut that isn't too tight. Classic fit is usually more forgiving for growing babies and easier to layer.
Products mentioned
- Ruffle Neck Knit Top - Baby: Features a soft knit bodice, woven ruffle neck collar with lace trim, gently belled sleeves with elastic ruffle cuffs, and a back keyhole neck closure. Made from 95% Organic Cotton, 5% Spandex. The spandex content gives this top stretch, so it can accommodate a range of baby body shapes. The elastic ruffle cuffs also help the sleeves stay put without being too tight.
- Organic V-Neck Sweater with Elbow Patches: Made from 100% GOTS-Certified Organic Cotton with a fine gauge knit, faux suede elbow patches, and rib trim at the collar, cuffs, and hem. Designed to layer over button-down shirts. Because it's 100% organic cotton with no spandex, this sweater has less give. The fine gauge and rib trim create a neat fit, so if your baby is between sizes, sizing up may be wise for layering.
- Organic Sweater Henley with Elbow Patches: A long sleeve sweater henley in soft organic cotton with faux suede elbow patches, matte button closure at the center front placket, and rib trim at the cuffs and collar. The henley style's button placket adds a bit of adjustability at the neck, which can help with dressing over a larger head. The rib trim keeps the cuffs and hem snug without being restrictive.
