When Should You Size Up Baby’s Diaper?
Every baby’s body is different, so the weight-based sizes on diaper boxes aren’t always the best fit guide.
Signs Baby’s diaper is too small include skin irritation, tabs that are too far apart, more blowouts, and restricted motor movements.
If it seems Baby is ready to size up, start with a small package of diapers in the next size before committing to a bigger box.
Figuring out the right diaper size for Baby can feel a lot like finding the perfect pair of jeans—except the stakes involve waddling, rashes, and the occasional explosive surprise.
Sure, those weight ranges on the package offer some guidance, but one-size-fits-all? Not in Babyland (or anywhere!). Two babies can weigh the same but one is long and skinny, while the other has chunkier thighs. And as they grow, they may carry weight more or less in different places.
So how can you tell when it’s time to size up besides weight? We’ve got your cheat sheet!
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How to Tell When Baby Needs Bigger Diapers
Baby’s Diaper Rashes Won’t Go Away
If those dreaded diaper rashes keep coming back despite using diaper cream and changing Baby frequently, their diaper size may be the culprit. Say goodbye to angry red patches by sizing up!
Their Diaper Leaves Red Marks
Sometimes, Baby’s diaper can leave red marks that aren’t diaper rash. Red indentations or coloring (not raised skin) where the waistband or leg cuffs touch can signal that the elastic is digging in too much.
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The Diaper Tabs Don’t Easily Reach the Middle
Baby’s diaper tabs should come to the middle without much effort. Many diaper brands have lines, colors, or symbols on the diaper to guide tab placement, so look out for those! Some even tell you when it’s time to size up or down depending on where the tabs can stretch to.
Does Baby hate diaper changes? Try these 6 tips to make it a fun sensory experience!
They Don’t Pass the Two-Finger Test
Another way to tell if Baby’s diaper is too snug: Place two fingers between the waistband and their belly and run them along the front. If it’s a tight fit and the tabs are as far apart as they should go, it may be time to go up a size!
Baby Has Frequent Leaks and Explosive Diapers
Surprise seepage can happen no matter what diaper Baby is wearing—but sizing up can help keep the disaster diapers to a minimum. Gapping in the back can indicate a too-big diaper. But if Baby’s diapers are constantly soaking through or have trouble containing bigger poos? A too-small size may be the issue!
Baby’s Diaper is Riding Too Low
The waistband should come up to just under their belly button. If it goes over, their diaper may be too big. If the fit reminds you of 2000s low-rise jeans, it’s likely a sign to size up!
Baby’s Movements Seem Stiff or Limited
A too-tight diaper can chafe Baby’s legs and make it uncomfortable to crawl or walk. And if it’s too big? Their stance may be wider, and you’ll have a little penguin waddling around!
☑️ Tip from a Physical Therapist: Research shows that wearing a diaper (regardless of size) can affect Baby’s walking abilities, so give them a chance to walk naked—like after a bath or before putting on a clean diaper—to practice with less restriction and better balance. Just make sure they walk on a floor that’s easy to clean if an accident happens!
When It Comes Time to Size Up Baby’s Diaper…
Remember, the weight recommendation on the box is just an estimate based on the average baby. Babies come in all shapes and sizes, so it can take some trial and error to find the right size and brand for your little one. If you think it’s time to move up, it’s a good idea to buy a small pack of the next size and test it out with the next few diaper changes before buying in bulk.
