DYPER Diaper Size Guide: Bamboo Sizing by Weight

DYPER builds its diapers from bamboo and sells mostly by subscription, with a compost-by-mail program for parents who want to keep diapers out of landfill. The right size keeps the soft bamboo build performing, and because DYPER ships on a schedule, getting the size dialed in before a big delivery matters more than with a grab-a-pack brand.

This guide covers DYPER's two lines, what to expect at each size, how much to buy, and how the sizing compares to other brands. Start with the finder above to match your baby's weight.

Understanding DYPER sizes

DYPER spreads its sizing across two lines. Simply Kind, the original viscose-from-bamboo diaper, starts at Newborn and runs through Size 6. Charcoal Enhanced, which adds a charcoal layer aimed at odor and sensitive skin, covers Size 1 through Size 6. Both follow the standard US weight ranges, so sizes match other brands, and weight rather than age is your guide.

The ranges overlap as usual, so a baby can wear two sizes during a growth phase; let the leg fit break the tie. The main gap to note is that neither line offers a Size 7, so the largest toddlers will need another brand at the end. Neither line is overnight-specific, so the everyday bamboo diaper does night duty too.

DYPER size chart

What to expect at each size

If you are starting from the newborn stage, Simply Kind is the line that goes earliest, covering Newborn and Size 1 through the frequent-change weeks. Keep your first order small, since babies move through these sizes fast and DYPER's subscription makes it easy to adjust.

Size 2 and Size 3 carry most of the first year, and Size 3 is the long-haul size. From Size 1 up you can choose between Simply Kind and Charcoal Enhanced based on whether you want the charcoal layer for odor and sensitive skin. This is the stage to settle on your preferred line and set your subscription cadence.

From Size 4 to Size 6, changes slow and get heavier. DYPER covers this stretch in both lines but stops at Size 6, so plan for a Size 7 alternative if your toddler grows into it. Because there is no overnight line, parents with heavy night wetters usually size up one for sleep.

Every DYPER diaper, reviewed

Charcoal Enhanced Diapers

Daytime

4.6$0.67/diaper

Luxuriously soft and hypoallergenic diapers with charcoal infusion for odor-fighting properties.

Read the Charcoal Enhanced Diapers review

Simply Kind Diapers

Daytime

4.4$0.54/diaper

Soft, plant-based disposable diapers with a stretchy fit and exceptional absorbency.

Read the Simply Kind Diapers review

Which DYPER diaper fits which size

If you are starting at the newborn stage, Simply Kind is the line that goes earliest. From Size 1 up you can choose between the two lines based on whether you want the charcoal layer. Neither line includes an overnight-specific or swim option, so the everyday diaper does night duty too. The grid above shows where each line begins and that both end at Size 6.

What DYPER diapers cost

DYPER is a premium eco diaper, priced above the budget and mid-tier brands to reflect the bamboo materials and the optional REDYPER composting service. The estimator above shows what that looks like across a year so you can weigh the green premium against your budget. Subscription pricing can soften the per-diaper cost compared with one-off purchases.

How many DYPER diapers to buy by size

Because DYPER is a subscription diaper, stocking is really about setting the right delivery cadence rather than hoarding packs. In the fast-moving Newborn and Size 1 weeks, start with a smaller, more frequent delivery so you are not left with a sealed box your baby has outgrown. At Size 3, the longest-worn size, you can comfortably scale up the subscription quantity. As a premium diaper, the cost of over-ordering a soon-to-be-outgrown size is higher, so adjust your plan as your baby approaches the middle of their current size's weight range, and keep a small buffer of the next size up.

DYPER sizing tips, from newborn to potty training

Because DYPER arrives by subscription rather than off a shelf, the key sizing habit is staying a step ahead of your delivery schedule. Weigh your baby every couple of weeks in the early months and adjust your upcoming order before a growth spurt rather than after, so you are never stuck with a sealed box of bamboo diapers your baby has just outgrown. DYPER makes mid-cycle size changes easy, but only if you act on the weight trend you are seeing.

Choose your line and stick with it for simplicity. From Size 1 up, Charcoal Enhanced and Simply Kind fit identically by size; the only difference is the charcoal layer for odor and sensitive skin, so pick based on your baby's skin and your nose, not on fit. If you start at the newborn stage, Simply Kind is the line that goes earliest. Neither line is overnight-specific, so for a heavy night wetter, size up one of your chosen line for sleep and keep the snugger size for daytime.

Plan for the price and the Size 6 ceiling. As a premium bamboo diaper, over-ordering a soon-to-be-outgrown size costs more here than with a budget brand, so keep early sizes lean and scale your subscription up at Size 3, the longest-worn size. DYPER stops at Size 6, so a larger toddler will need a Size 7 alternative for the final stretch. Confirm each new size on a smaller delivery before committing your full subscription quantity, and use the leg seal and the two-finger waistband test to judge the fit.

Getting the fit right

DYPER runs true to size with a soft, flexible fit. As a subscription diaper, it pays to confirm the fit on a smaller order before scaling up: check that tabs reach the center, the leg cuffs cup the thighs, and there are no marks or leaks. Step up at the usual signs. The quick checker above helps you judge whether your current size still fits.

Switching to or from DYPER

Switching to DYPER from a mainstream brand keeps your size number, since it uses the standard weight chart, but two things differ: the diaper is a soft bamboo build rather than a conventional one, and it arrives by subscription rather than off a shelf. Try a smaller order first to confirm the fit and feel, and because the lines stop at Size 6, plan a Size 7 alternative for a larger toddler. Charcoal Enhanced and Simply Kind fit the same by size; the difference is the charcoal layer, not the cut.

Common DYPER sizing mistakes to avoid

The subscription model creates DYPER's most common mistake: letting the delivery schedule run ahead of your baby's growth, so a box of bamboo diapers arrives in a size your baby has just outgrown. Adjust the upcoming order the moment the weight trend points to a size change rather than after the fact. A second mistake is choosing between Simply Kind and Charcoal Enhanced as if they fit differently; from Size 1 up they fit identically by size, so pick based on the charcoal layer and your baby's skin, not on cut.

A third pitfall is starting too late. If you want bamboo from birth, Simply Kind is the line that covers Newborn, so do not assume DYPER skips the newborn stage as some eco brands do. A fourth is ignoring the Size 6 ceiling: neither line offers Size 7, so a larger toddler needs an alternative for the final stretch. As a premium diaper, over-ordering a soon-to-be-outgrown size stings, so confirm each new size on a smaller delivery before scaling the subscription up at Size 3. And as with any diaper, judge fit by weight and the leg seal rather than by age, sizing up when tabs no longer reach the center or leaks appear.

How DYPER compares

Here is how the Charcoal Enhanced diaper compares with the alternatives parents most often consider.

The bottom line

DYPER is for parents who want a bamboo-based, lower-waste diaper and the convenience of subscription delivery from Newborn through Size 6. Get the size locked in, set your delivery cadence to your main size, and the soft build does the rest.

Comparing brands? Browse our other diaper size guides to see how the fit and sizing stack up.