The Brutal Truth About H&M Sizing and My Fast Fashion Paradox

Sarah
2026-04-05T07:29:15+02:00

I was literally sitting on the floor of Maya’s nursery, which was painted this exact shade of sage green that I spent three weeks hyper-fixating on during my third trimester, crying over a tiny beige cardigan. She was maybe eight weeks old, screaming her head off because I was trying to shove her surprisingly chunky arms into this knitted sweater I bought at the mall. Dave was leaning against the doorframe holding a mug of coffee that had definitely been microwaved three times already, looking at me like I was losing my mind, which, to be fair, I was.

Before I had kids, I had this whole aesthetic mapped out in my head. I was going to be the Earth Mother. My children would only wear hand-loomed linen and ethically sourced wool in colors like "oat" and "river rock." I scoffed at multipacks. I actually rolled my eyes at fast fashion. And then I had Leo, and three years later Maya, and realized that a baby can and will produce enough bodily fluids in a 24-hour period to destroy six different outfits.

Which is how I found myself panic-buying an enormous stack of H&M baby clothes at 3 AM while breastfeeding.

If you're a new parent, you're going to end up looking at this brand. It’s inevitable. They have absolutely nailed the "Scandi-neutral" aesthetic that we all crave, and when you're buying for a rapidly growing baby boy or a baby girl who seems to outgrow a size every Tuesday, the price tag is impossible to ignore. But honestly, trying to figure out how their stuff actually fits and lasts is like trying to decipher ancient hieroglyphics while sleep-deprived.

The bizarre reality of the long and lean fit

Okay, so let’s talk about the sizing, because WHAT IS THIS. Most normal brands use standard sizing. You get a 0-3 months, maybe a 3-6 months. You know what you're getting. But H&M uses these weirdly granular brackets like 1-2M and 2-4M, which completely melted my brain when I was trying to figure out what to pack in my hospital bag.

Here's the truth that nobody tells you until you’re deep in the trenches: their clothes are apparently modeled on baby ferrets. They run so incredibly long and narrow. When Leo was born, he was basically a butterball—just rolls on rolls, the cutest little Michelin Man. I tried to put him in a pair of their ribbed leggings and they were practically cutting off his circulation at the thighs while extending a full six inches past his feet. I had to roll them up so many times he looked like he was wearing ankle weights.

But then Maya came along, and she was this long, string-bean baby. Suddenly, the weird tubular sizing made sense. The onesies actually fit her torso without giving her a wedgie.

Oh, and if you're using cloth diapers, the pants are surprisingly great because of that extra length, since you've to accommodate the massive fluffy butt, but you really have to watch the waistbands because they've absolutely zero give. Anyway, the point is, if you've a chunky baby, you're going to be fighting for your life trying to get those sleeves over their wrists.

The great snap crotch debate that ruins my marriage

I need to rant about snap closures for a minute because I think about this every single night of my life. A lot of the fast fashion bodysuits have these double rows of snaps at the crotch, which they claim is a "grow with me" feature. In theory, this sounds amazing. Oh, the baby got longer? Just use the second row of snaps! Extend the life of the garment!

In practice, it's pure hell.

Imagine it's 2:45 AM. You have just wiped an ungodly amount of poop off your screaming child's back. You're functioning on zero REM sleep. The room is dark because you don't want to turn on the big light and fully wake them up. You go to snap the bodysuit back together, and there are suddenly EIGHT DIFFERENT SNAPS in two different rows, and they're all slightly misaligned. Dave literally just leaves the middle one unsnapped now. He refuses to engage with it. He says it’s a design flaw and he won't be bullied by a piece of cotton.

I'll say this for the cheaper basics though—they mostly skip the scratchy physical tags at the back of the neck and print the labels right on the fabric, which is great until the printing wears off after four washes and you've to hold the shirt up to the light to figure out if it's the 4-6M or the 6-9M size.

By the way, don't buy infant shoes, they're literally pointless foot prisons and they'll just fall off in the grocery store parking lot anyway.

What my pediatrician genuinely said about fabrics

This is where my whole Earth Mother fantasy violently collided with my budget. H&M pushes their 'Conscious' line really hard, and they use a lot of organic cotton. When Maya was about three months old, she developed these rough, red, angry patches on her stomach and the back of her legs. I completely freaked out and dragged her to Dr. Aris, convinced she had some terrible allergy.

He looked at it, sighed, and told me it was just contact eczema. He basically explained that newborn skin is stupidly fragile, and whatever chemical cocktail they use to process, dye, and ship mass-market clothing can just trigger massive irritation. He told me to strip her down, use a heavy ointment, and switch to the cleanest, highest-quality organic stuff we could manage for her base layers.

I went home and looked at my giant pile of cheap multipacks. Yeah, they said "organic" on the tag, but they felt kind of thin and crunchy after I'd washed them a few times on high heat to get the milk stains out. They just didn't hold up.

If you want to survive this phase without losing your mind or your budget, you just have to embrace a blended strategy where you mix the cheap stuff that you don't mind throwing away after a blowout with the truly good, sustainable pieces that sit right against their skin all day.

For those base layers, I honestly completely rely on the Organic Cotton Baby Bodysuit from Kianao. The difference in the fabric is jarring. When you touch it, it’s thick and buttery, not that weird sheer material that fast fashion brands use to cut costs. It’s got a tiny bit of elastane in it so it honestly stretches over Maya’s giant head without her screaming, and more importantly, it doesn’t lose its shape or get scratchy after Dave accidentally washes it on the nuclear sanitize cycle. Dr. Aris said keeping her skin breathing in real, high-grade cotton was probably what helped clear up the eczema, though honestly I only vaguely understand the science behind textile microclimates. I just know she stopped scratching.

When aesthetic ideas go totally wrong

Because I'm a victim of marketing, I also bought a bunch of "going out" outfits. You know, the little rompers with the ruffles, the tiny cardigans.

Okay, full disclosure here. I also bought the Flutter Sleeve Organic Cotton Baby Bodysuit because I was deeply sleep-deprived one afternoon and thought, "Oh god, she needs something beautiful for when we go to brunch." Mind you, we hadn't been to a sit-down brunch since 2019.

Is it gorgeous? Yes. The fabric is that same amazing, non-irritating organic cotton. She looks like a tiny, comfortable woodland fairy in it. But trying to stuff ruffled flutter sleeves into a tight winter coat or a sleep sack is a unique form of torture. They bunch up all the way to her ears, and then she gets mad. So it’s an incredible piece, but it's strictly a warm-weather, no-layers-needed outfit for us now.

Explore Kianao's organic baby clothes collection if you want stuff that honestly lasts past one kid.

The true cost of the fast fashion paradox

I guess what I’m trying to say is that I feel incredibly guilty about how much baby clothing we cycle through. H&M is great for when Leo goes to forest school and comes back looking like he was dragged through a literal swamp. I don't cry when a $4 shirt gets ruined by mud and whatever sticky substance he found on the playground.

But those clothes are not heirlooms. You can't really pack them away in a cedar chest for your grandchildren. After one kid wears them for three months, the knees are shot, the seams are a little twisted, and the color is faded.

And when they're teething? Forget it. Maya chewed on the collar of her fast-fashion shirts until they were soggy, stretched-out disasters that hung off her shoulder like an 80s workout video.

Speaking of teething, which is its own special nightmare, if you're buying baby stuff right now, skip the cheap plastic accessories at the mall and just get the Panda Teether. When Maya got her first bottom teeth at five months, she turned into a completely different, extremely angry baby. I was freezing wet washcloths, giving her my knuckles, everything. The Panda teether is flat enough that she could honestly hold it herself without dropping it on the filthy floor of the grocery store every three seconds, and I could just throw it in the dishwasher. It’s food-grade silicone, which makes me feel way better than whatever mystery plastic the cheap toys are made of.

Parenting is basically just an exercise in compromising your past ideals with your current reality. You don't have to choose between being perfectly sustainable and being broke. Let the baby wear the cheap leggings to daycare, but maybe invest in the good bodysuits so they can seriously sleep at night without itching.

Before you dive into the frantic 3 AM online shopping spiral, take a breath. Check out the teething toys and organic essentials at Kianao—your baby's skin (and your sanity) will probably thank you.

My messy, totally subjective FAQ

Does H&M baby stuff shrink in the wash?

Oh god, yes. Unless you're the kind of perfect domestic goddess who washes everything on cold and carefully lays it flat to dry on a wooden rack, it's going to shrink. We wash everything on warm and throw it in the dryer because who has the time, and I'd say their stuff loses about half a size in length after the first heavy wash cycle. If you're on the fence, definitely size up.

Is their organic line genuinely safe for sensitive skin?

I mean, it's better than synthetic polyester, but my pediatrician basically told me that mass-produced cotton is still treated heavily during the manufacturing and shipping process. When Maya’s skin was super flared up, the cheap multipacks still made her red. It wasn't until we switched to the really premium, untreated organic stuff for her base layers that the contact rash finally chilled out.

What's the deal with the 1-2M and 2-4M sizing?

I literally have no idea why they do this. It’s infuriating. 1-2M is basically a generous newborn size. 2-4M is like a long, skinny 0-3 month size. My advice? Look at the weight and height measurements on their size chart, completely ignore the month label, and remember that it's going to be tight on a chunky baby's thighs regardless.

Can you fit cloth diapers under fast fashion baby clothes?

Yes and no. The pants seriously work okay because they run so stupidly long, so the bulky diaper sort of hikes them up to a normal length. But the bodysuits? Forget it. Trying to snap a slim-fit onesie over a giant reusable night diaper is like trying to close an overstuffed suitcase. You will absolutely need bodysuit extenders or you just have to size up twice and deal with the baggy shoulders.