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Happy Heinys XS vs. Mini One Size Pocket Newborn Diapers – Comparison

Happy Heinys XS VS Mini OS 1

Last month, I posted a Happy Heinys XS/newborn pocket diaper review and a Happy Heinys mini one size diaper review. Now I’m going to compare the two!

Happy Heinys XS VS Mini OS 2 mediumHappy Heinys XS VS Mini OS 4 back
Happy Heinys XS VS Mini OS 5 side

The mini one size actually gets a bit smaller than the XS, rise-wise. Above is the XS (brown w/blue hibiscus print) vs the mini one size (pink) on the medium setting.

Happy Heinys XS VS Mini OS 6 one size vs mini smallHappy Heinys XS VS Mini OS 7 xs vs os small

You can see that the XS isn’t much smaller (rise-wise) than the Happy Heinys One Size, while the mini one size is a bit smaller. However, the XS is definitely narrower through the crotch.

Here’s the smallest setting of the mini one size (pink) folded and stretched, vs the XS pocket (brown w/blue hibiscus.)

Happy Heinys XS VS Mini OS 8 small mini os foldedHappy Heinys XS VS Mini OS 9 small mini os stretched

Happy Heinys XS VS Mini OS 10 xs foldedHappy Heinys XS VS Mini OS 11 xs stretched

Both have the same velcro closures, but the front panel of the XS (on top in the right photo) is a bit smaller/narrower than the mini one size.

Happy Heinys XS VS Mini OS 12 closuresHappy Heinys XS VS Mini OS 13 front panel

The XS doesn’t have encased leg elastic, which is supposed to be more gentle.

Happy Heinys XS VS Mini OS 14 elasticHappy Heinys XS VS Mini OS 15 inners

They both have the same inner as well. I think the XS is a good bit narrower through the middle than the mini one size, so I’d expect it to be less bulky on tiny babies. Unfortunately, I didn’t buy the insert for either one, so I don’t know how they compare!

Happy Heinys XS VS Mini OS 16 mini os smallHappy Heinys XS VS Mini OS 17 mini os small back
Happy Heinys XS VS Mini OS 18 xs frontHappy Heinys XS VS Mini OS 19 xs back

Once on my “model” you can’t tell too much of a difference. Again, I think the rise on the mini one size (pink) is a bit lower than the XS, but the XS is a little narrower.

The mini one size diaper retails for $17.95 (with two inserts), and will take you from the newborn stage, until the one-size diapers fit (the largest size of the mini is very similar to the smallest size of the o/s…see the mini one size review for photos.) Happy Heinys’ Weight range on these is 4-15 pounds.

The XS pocket diaper retails for $18.95 (with one insert), and thus far, I haven’t been able to find an estimated weight range for them. They do have the benefit of being a little bit narrower, and the un-encased leg elastic is supposed to be gentler (I prefer encased.)

For $1 less, the mini-one size gets you an additional insert, and more sizing flexibility, so it seems like a “no-brainer” to me.

What do you think?

FTC compliance: I purchased the above products myself, with a coupon code. I was not compensated for this post and all opinions are my own.




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Maria Moser
Maria is the mother of 3, writing about cloth diapers & going green. You'll often find her juggling her preschooler and typing 1-handed in between sips of cold coffee. Maria works with many companies within the cloth diaper industry and beyond, providing social media management, product development and other services.

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