Why we built this
DiaperFitFinder started with a simple problem: a parent at 3 a.m. trying to figure out whether to size up.
If your baby is 14 pounds, are they a size 2 or a size 3? Pampers says size 3 starts at 16 pounds. Huggies says size 3 starts at 16 pounds too — but their size 2 only goes to 18, so a 17-pound baby could fit either. Honest Diapers run smaller. Coterie runs larger. Costco’s Kirkland Signature is a great deal but only available in certain sizes. Walmart’s Parent’s Choice is even cheaper but doesn’t come in overnight.
We searched for a single tool that would tell us, given our baby’s weight, what every brand currently makes that fits — sorted by price-per-diaper across the actual stores we shopped at. We couldn’t find one. Most price comparison sites are run by retailers themselves, which means they only show you their own products. The independent ones we found were either out of date, missing major store brands, or cluttered with affiliate links to one or two preferred sellers.
So we built DiaperFitFinder.
What we do
We track 425+ diaper variants across 20+ brands, including every major store brand: Kirkland Signature (Costco), Member’s Mark (Sam’s Club), Up & Up (Target), Parent’s Choice (Walmart), Mama Bear (Amazon), Berkley Jensen (BJ’s Wholesale), and Comforts (Kroger). Across six categories: infant, training pants, overnight, bedwetting, swim, and youth incontinence.
For each product, we record the manufacturer’s published weight range, gender variant if any, and currently-available pack sizes. Our Fit Finder lets you enter your child’s weight and see every option that genuinely fits — using the real weight ranges from each brand’s packaging, not generic size charts.
When you find a product you like, we pull live prices from the major retailers — Amazon, Walmart, Target, Costco, Sam’s Club, Honest’s direct-to-consumer site, and others — so you can see the actual current price-per-diaper before you buy. We never store payment information, never ask you to create an account, and never email you unless you specifically ask us to.
How we make money
Honest answer: affiliate commissions. When you click through to a retailer like Amazon or Walmart and buy something, the retailer pays us a small percentage of the sale (typically 1-4%). The price you pay is exactly the same as if you’d gone directly to the retailer — we don’t mark anything up.
That’s the entire business model. We don’t get paid by Pampers or Huggies to recommend their products. We don’t accept advertising from diaper brands. We don’t run sponsored content. The buying guides are written based on independent research and reflect our actual conclusions — including conclusions that might cost us affiliate revenue (we tell you when a store brand is just as good as a name brand at half the price, even though we earn less commission on the cheaper option).
If a brand or retailer offers us money to change a recommendation, we’ll publish that fact and turn down the offer. So far it hasn’t happened.
Who we are
DiaperFitFinder is a small independent project. We’re not a venture-funded startup. We’re not a media company. We’re parents who got tired of the diaper aisle and built the tool we wished existed.
If you have feedback, a brand we should add, or a price we got wrong — we genuinely want to hear about it. The contact page has our email.
What we won’t do
- We won’t tell you one brand is “always best.” No diaper is best for every baby. Skin sensitivity, fit, lifestyle, and budget all matter, and they vary. Our job is to help you compare; the choice is yours.
- We won’t write fake reviews or fabricate testimonials. When we recommend a product, it’s because of independent research and (where possible) firsthand testing.
- We won’t pretend store brands are inferior. Many store brands are manufactured by the same companies that make name brands — the difference is often just packaging and price. We’ll tell you when that’s the case.
- We won’t sell your data. We don’t have your data to sell. There’s no signup, no tracking pixel beyond standard analytics, no email list unless you actively join one.