Thirsties One Size AIO
The Thirsties One Size AIO comes in 1 size, lists sizes up to 40 lb, and starts with a size for babies up to 40 lb, per Thirsties. Thirsties' synthetic one-size all-in-one with microfiber terry absorbency, sized for about 8 to 40 lb.
- One Size to One SizeSizes
How the One Size AIO stacks up
Against the 32 cloth diapers we track. The shaded band is where the middle half of them fall; the dot is this one.
Within the typical range for cloth diapers (1 to 4).
Within the typical range for cloth diapers (30 lb to 40 lb).
Above the typical range for cloth diapers (12 lb to 35 lb).
What sets the One Size AIO apart
Measured against the 32 cloth diapers we compare, from each maker's published specs.
- Smallest size up to: 40 lbabove the middle half of the 25 cloth diapers that publish it (12 lb to 35 lb)
Next to its closest matches
- Thirsties Newborn AIONext to it, the One Size AIO is 26 lb higher; 26 lb bigger.
Size & weight chart
Weights as the maker lists them, in lb.
| Size | Weight | Shared with next size |
|---|---|---|
| One Size | 8–40 lb | – |
Cloth system & wash
| Type | All-in-one |
|---|---|
| Fabric | 4 total layers of microfiber terry (maker blog) |
Listed features
- Wide one-size range
Where to buy the One Size AIO
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- Check for recalls: Search the agency's recall list with the model number and date code from the label: CPSC recall search.
Full specs
| Thirsties One Size AIO | |
|---|---|
| Type | Cloth diaper (all-in-one) |
| Sizes and weights | One Size: 8–40 lb |
| Materials | 4 total layers of microfiber terry (maker blog) |
Compare the One Size AIO with
How each closest rival differs from the One Size AIO, from the makers' specs.
- ThirstiesNatural One Size AIO1 sizeto 40 lbCompare side by side
- ThirstiesNatural Newborn AIOCompare side by side
- ThirstiesNewborn AIO1 sizeto 14 lb
- 26 lb lower
- 26 lb smaller
- ThirstiesOne Size PocketCompare side by side
One Size AIO: questions answered
From Thirsties's published specs, last checked 2026-11-02.
What sizes does the Thirsties One Size AIO come in?
One Size (8–40 lb), per the maker. Makers size diapers by weight, and their ranges overlap. Check the maker's size chart.
How do I wash the Thirsties One Size AIO?
Follow the maker's wash routine. Most cloth diapers need a prewash, a long hot main wash, and no fabric softener.
Still wondering? Write to us at hello@cribpicks.com and we'll look it up.
More cloth diapers
- ThirstiesNatural One Size Pocket1 sizeto 40 lb
- GroViaBreeze Diaper5 sizesto 40 lb
- Kanga CareLil Joey Newborn All in One Cloth Diaper1 sizeto 12 lb
- GroViaBig O.N.E. Cloth Diaper1 sizeto 70 lb$27.95
- GroViaOrganic All In One1 sizeto 10 lb$25.95
- GroViaO.N.E. Cloth Diaper1 sizeto 35 lb$24.95
Where these specs come from
Last checked 2026-11-02. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.