All The Alpacas Size 4 Diapers: Fit, Absorbency, and Sizing Up
By The Honest Company: Honest Baby and Beauty Company | Published: 2026-10-31
Category: Product Reviews
A practical review of Honest Clean Conscious Diaper All The Alpacas in Size 4, covering fit, absorbency, and clear rules for deciding when to move up to Size 5.
Quick answer
Buy the All The Alpacas Size 4 if your baby is comfortably within Size 4 and you want a soft, OEKO-TEX certified diaper with a playful print. Size up to Size 5 when you see consistent red marks, frequent leaks, or the tabs no longer sit flat.
What the Alpaca print changes (and what it doesn't)
The All The Alpacas design is a print option on the same Honest Clean Conscious Diaper platform. Choosing it does not change the fit, absorbency, or safety testing; it only changes the look. That matters if your baby is between sizes: you can pick the print you like without compromising performance.
One practical trade-off: a bold print makes it easier to spot leaks or blowouts quickly, but it can also show through very thin white clothing. If you dress your baby in light colors, a subtler print may be a better match.
Absorbency expectations for Size 4
Honest Clean Conscious Diapers are designed with Comfort Dry Technology and up to 100% leak protection, according to the brand. In real use, absorbency depends on how often you change and how much your baby drinks, so treat the size as one part of the leak equation.
If leaks happen mostly overnight, try a fresh diaper right before bed and check that the legs are fully fanned out. If leaks persist across several days, that is a fit signal, not just an absorbency problem.
Why the Size 4 to Size 5 decision is not just weight
Weight ranges are a starting point, but body shape, thigh circumference, and activity level often matter more. A baby who is technically in the Size 4 range can still need Size 5 if the tabs are stretched to the edge or the diaper leaves marks.
The reverse is also true: a baby near the top of Size 4 may stay comfortable longer if the fit is clean and leaks are rare. Use the decision rules below rather than the calendar alone.
Decision rules for All The Alpacas Size 4
- Stay in Size 4: Keep Size 4 if the waistband sits flat, the tabs land inside the landing zone, and you see no red marks after an hour of wear. Check for marks at every change for two days before deciding.
- Move up to Size 5: Size up when you see two or more of these in a week: leaks at the legs or back, tabs reaching the very edge, red marks that fade slowly, or the diaper sagging heavily when wet. Change one variable at a time so you can tell whether size or absorbency was the issue.
- Do not size up for a single leak: One overnight leak is usually a change-timing or fit-fanning issue. Fix the leg cuffs and bedtime change first; only size up if the pattern repeats.
- Print choice is separate from size: If All The Alpacas is out of stock in Size 4, any other Honest Clean Conscious print in Size 4 will fit the same way. Do not switch sizes just to get the print.
Product facts
- Honest Clean Conscious Diaper®, All The Alpacas, Size 4: OEKO-TEX STANDARD 100 certified and third-party tested for 350 harmful chemicals. This gives chemically conscious parents a documented safety checkpoint for delicate skin.
Honest Clean Conscious Diaper®, All The Alpacas, Size 4
Who should choose All The Alpacas Size 4
Best for
- Babies solidly within Size 4 who want a soft, certified diaper with a playful print
- Parents who want a visual cue to spot leaks quickly
Not for
- Babies already showing consistent Size 5 fit signals such as red marks or frequent leaks
- Families who prefer plain white diapers under light clothing
