Database — Every number shows its working
| Brand (model example) | Size | Typical pack count | Example price | Cost / diaper | Type | Note |
|---|---|---|---|---|---|---|
| Pampers Swaddlers | NB | 104 | $31.99 | $0.308 | Tape | Soft, hospital favourite |
| Pampers Swaddlers | 1 | 198 | $52.99 | $0.268 | Tape | Big-box example |
| Pampers Swaddlers | 3 | 198 | $52.99 | $0.268 | Tape | Big-box example |
| Pampers Cruisers 360° | 5 | 132 | $48.99 | $0.371 | Pull-on | For standers & wigglers |
| Huggies Little Snugglers | 1 | 198 | $51.99 | $0.263 | Tape | Pocketed waistband |
| Huggies Little Movers | 3 | 192 | $49.99 | $0.260 | Tape | Big-box example |
| Huggies Pull-Ups style pants | 4 | 148 | $46.99 | $0.318 | Pull-on | Training transition |
| Luvs | 2 | 234 | $38.99 | $0.167 | Tape | Budget name brand |
| Luvs | 4 | 198 | $38.99 | $0.197 | Tape | Budget name brand |
| Honest Company | 3 | 160 | $49.99 | $0.312 | Tape | Prints, subscription push |
| Store brand (Walmart-style) | 1 | 210 | $27.98 | $0.133 | Tape | Parents' Choice-type example |
| Store brand (Target-style) | 3 | 210 | $27.99 | $0.133 | Tape | Up & Up-type example |
| Store brand (warehouse club) | 4 | 198 | $34.99 | $0.177 | Tape | Kirkland-type example |
| Merries (Japan) | M tape | 64 | $17.00 | $0.266 | Tape | ¥ model shown in $ approx — see Japan guide |
| Moony (Japan) | M tape | 64 | $17.50 | $0.273 | Tape | ¥ model shown in $ approx — see Japan guide |
Green rows model under 18¢ per diaper. Japanese brands are shown with an approximate dollar conversion for comparison only — the Japan guide works natively in yen and kilograms, which is how you will actually shop there.
Tiers are more stable than prices: whichever week it is, store brands model cheapest, premium-print brands priciest, and the name brands sit in between. Your job is only to check where this week's live prices land inside the tiers.
Every size-up quietly raises your cost per diaper, because bigger diapers use more material and packs hold fewer of them. In the models above, moving from size 1 to size 4 in the same brand lifts the unit price roughly 25–40%. Two consequences follow. First, never compare a size-1 unit price with a size-4 unit price and call one brand cheaper — compare within the same size, always. Second, a baby who sizes up is not "getting more expensive because you chose wrong"; the curve is built into the product. Budget for it with the monthly simulator rather than blaming the brand.
Pull-on (pants-style) diapers model about 15–35% pricier per unit than tape diapers of the same brand and size. You are paying for a standing change on a baby who treats lying down as a personal insult — sometimes worth every cent at month ten, rarely worth it at month three. The buying guide walks through when the switch actually pays.
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