Baby diapers

Kirkland Signature Supreme Diapers

Kirkland Signature Supreme Diapers

Best forParents looking for quality diapers they can buy in bulk

Top BenefitsSoft material, flexible waistband, resealable Velcro tabs

ConsiderationsOnly available at Costco

Bottom lineKirkland Signature Supreme Diapers are good quality, with soft and stretchy material, sturdy tabs and great absorbency—all for an affordable price



  • Stretchy waistband
  • Colour-changing wetness indicator
  • Super-soft lining
  • Resealable fasteners
  • Two cute designs in every box


New parents soon learn that bad diapers cause big, smelly, messy problems, so choosing the right diaper is imperative. From birth to the last hurrahs of toilet training, you’ll go through thousands of diapers, so you want a brand that offers excellent value for money but is of high enough quality to keep all that is nasty contained within. Kirkland Signature Supreme Diapers hits this sweet spot. They're easy to use, soft against baby’s skin, have excellent absorbency, and stay put thanks to great tabs (an important feature). In fact, several of our parent testers raved about these diapers, saying they were their favourite among the disposables they’ve tried.


Our lab tests showed that these diapers absorbed liquid quickly, taking it away from baby’s skin, and the pocketed waistband was great at preventing leaks. All but one of our parent testers felt these diapers did a great job of containing leaks, and the vast majority were happy using the diapers overnight. Our parent testers also really appreciated the wetness indicator, which took the guesswork out of when to change their little ones.

Love these diapers. They always fit a little on the larger size, which helps contain blowouts and leaks. Works well for overnight—no leaking noticed even with it being full.” —Michelle, parent of one

Kirkland Signature Supreme Diapers are soft and light, and feel great against baby’s tender tushie. In our lab test, our editors observed that the diaper had quite a bit of stretch in the back and sides, but it still felt nice and secure thanks to its well-constructed tabs. Again, all but one of our parent testers felt that the diaper fit their babies well, was flexible around the waist, and felt secure.

My favorite brand—no strong smells—overall fit larger so lasts longer in one size.” —Andrea, mom of three

We found no issues when it came to changing baby, and loved the easy-to-use Velcro tabs. A textured target takes the guesswork out of feeling where the tabs need to go—something you’ll appreciate when changing baby at 2 a.m. with your eyes half-closed. The tabs are also resealable, so getting the proper fit is a breeze, and checking to see what's in there doesn't mean wasting a diaper if it doesn't need to be changed.

I really like the added Velcro on the fastener as it holds the diaper securely in place without bunching at the legs.” —Erin, mom of two

Lower cost can sometimes mean that a product isn't as good as a higher-priced option, but all of our parent testers said they’d buy the Kirkland Signature Supreme Diapers because of the great quality they offered at a lower per-diaper cost than premium brands. The only drawback, according to one tester, is having to stand in line at Costco to get them.


If you’re already a member of Costco (the only place you can pick these diapers up), then you may find Kirkland Signature Supreme Diapers become your go-to pick. Our editors and parent testers all agreed that there’s no compromise on quality despite the diapers being considerably less expensive per diaper than other brands. For their value, ease of use and dependability, we're happy to give Kirkland Signature Supreme Diapers the Today’s Parent Approved seal.

This is my favourite out of all the disposable brands we have tried, and we have tried many! What a surprising gem this was. If you're looking for a lower-priced, high-quality diaper this is it. We have been very happy with this product.” —Dawn, mom of one

Tech Specs

    Size 1: Up to 14lbs.
    Size 2: 12-18 lbs.
    Size 3: 16-28 lbs.
    Size 4: 22-37 lbs.
    Size 5: 27 lbs. and up
    Size 6: 35 lbs. and up

Weekly Newsletter

Keep up with your baby's development, get the latest parenting content and receive special offers from our partners

I understand that I may withdraw my consent at any time.