Kirkland/Costco Diapers Review Roundup

costco diaper

Are you using the Costco/Kirkland brand of diapers? Or thinking about switching? My family has used these diapers (and many other brands over the years). Here’s a roundup of what parents are saying about Costco diapers.

Overwhelmingly Positive Reviews

I’ve reviewed a ton of products. It is seldom that I see such positive reviews about a product, period.

costco diapers review

Google shopping reviews are a 4.7 out of 5

In my personal experience, Costco diapers are pretty awesome. I used them with each of my three children (two boys and a girl). I found them to be of high quality, and very effective in keeping the pee where it should be. I was pleased with the quality of the material, and while the diapers were affordable (meaning almost always cheaper than I could find diapers on the shelf at the regular grocery store), I didn’t feel that the diapers were “cheap” feeling.

I have purchased the generic brand of diapers from Winco, Walmart, Safeway, and other grocery stores. The other generic diapers felt “hard” and scratchy, and smelled like chemicals. My kids seemed to get more diaper rashes with generic brands as well. Further, they tended to rip, and didn’t hold all that much of the #1 or the #2.

My overall recommendation for Costco/Kirkland diapers is a solid 4.5 out of 5. But see below for what others have to say.

Fans say….

Having tried the cheap-o diapers (along with Pampers, Huggies, and others) I was not surprised then, to see the following reviews about this Kirkland product:

  • diapers absorb better than pampers
  • hold much more than pampers
  • great price for a giant box
  • great fit
  • no leaks
  • hold up well
  • super chubby legs and still fit great
  • very affordable
  • no scent at all
  • repeat buy
  • baby likes them fine
  • good quality, without being paper thin
  • run true to size
  • never irritated sensitive skin
  • very functional
  • do the job well
  • work really well
  • hold up really good
  • comparable to Huggies (which is apparently a good thing?)
  • awesome price tag
  • totally worth it
  • best value
  • perfect because they stretch
  • love the yellow/blue line feature (when diaper is wet)
  • contoured nicely and very absorbent
  • love the stretchy waistband around the back
  • no harsh smell
  • not a droopy diaper
  • no more blow-outs
  • baby can go 12 hours overnight without leaks
  • love that Costco does sales with free shipping on diapers
  • happy with this product

Truly, there are hundreds of positive reviews from raving fans of these diapers.

Haters say…

However, not everyone loved them. Here’s what the haters had to say:

  • gave daughter a terrible rash
  • fine, cost effective, but not as soft as wanted
  • not absorbent at all
  • Absorbed pee very well but easily defeated by poop monster little boy
  • size was really too big for the child so pee leaked a lot
  • just okay
  • too stiff
  • comparable to Huggies (which is apparently something negative?)
  • not cute enough
  • leaky
  • design is “crappy” (as soon as you pop off the diaper it folds in on itself getting poop everywhere)
  • fails to hold in massive blowouts
  • elastic on the legs wasn’t stretchy enough
  • when the child pees, the diaper REALLY smells like pee
  • annoyances with the recent changes to design (don’t fit the same)
  • loved one size but hated next size up (didn’t fit well)
  • recent design changes to the wings/tabs are bad, the closure is not smaller, skinnier and weaker, and the tabs rub on baby’s skin


Here’s how the various sizes are divided up:

Size 1: up to 14lbs

Size 2: 12-18lbs

Size 3: 16-28 lbs

Size 4: 22-37lbs

Size 5: 27 lbs and up

Size 6: 35lbs and up

Cost comparisons

The cost of the “giant” box of diapers is generally about $35-$44 dollars, though the price fluctuates some between the various sizes. However, if you are purchasing these diapers through Costco, remember that the membership fee of at least $60 per year is required, and you need to factor that extra cost into the price. If you are not a Costco member, you can order from without being a member if you pay a small transaction fee (a few dollars).

Here’s what the diapers cost from (as of the date of publishing this post):

Size 1: $30 for 192 diapers (0.15/diaper)

Size 2: $30 for 174 diapers (0.17/diaper)

Size 3: $36 for 198 diapers (0.18/diaper)

Size 4: $36 for 180 diapers (0.20/diaper)

Size 5: $36 for 150 diapers (0.24/diaper)

Size 6: $36 for 120 diapers (0.30/diaper)

costco diapers
As listed for sale on

You can actually get access to these diapers without a Costco membership. I have seen them for sale on,, and on eBay. The prices vary, but here’s the best price I found for each size on Amazon:

Size 1: $36 for 192 diapers (0.18/diaper)

Size 2: $27 for 174 diapers (0.15/diaper)

Size 3: $33 for 198 diapers (0.16/diaper)

Size 4: $42 for 180 diapers (0.23/diaper)

Size 5: $34 for 150 diapers (0.22/diaper)

Size 6: $35 for 120 diapers (0.29/diaper)

In most cases, the price is fairly competitive with stores around the internet. But if you don’t have a Costco membership, paying the same price and getting free shipping from Amazon may actually be a better deal than paying for a Costco membership. (In addition to spending money on gas to drive to Costco, and then also buying all of the wonderful things that there are to be found within the four walls of a Costco).

How does pricing compare to Pampers and Huggies?

I did a bunch of hunting around Amazon to get an idea of the costs per diaper. Int he table below, I’ve set out some of the prices per diaper I could find. If I were you, I would take this table with a grain of salt. I think if you look hard enough, you can probably find diapers on sale SOMEWHERE, and find a better deal than what I have listed here for Pampers and Huggies, though you might not find the deal in your local supermarket on your way home after work. (Prices are noted below per diaper).

In any case, it seems like it is possible to get a per diaper deal with Costco diapers, if you aren’t paying membership fees or shipping costs on top of the basic price for the diaper.

[table id=1 /]

Have you used Costco diapers? What are your thoughts or questions? Let us know in the comments below.

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