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Cloth 101: How to size your bumGenius One-Size cloth diapers
September 17, 2012 11:28 am | by

At Cotton Babies, we believe that there are no dumb questions. Sometimes it is difficult if you are new to cloth diapers to understand exactly how our bumGenius, Flip, Econobum and Elemental Joy cloth diapers and covers can fit a growing baby from birth through potty training.

Each of our one size cloth diapers have three rows of snaps, three snaps in each row. This 3×3 snap down design gives each diaper a small, medium and large size setting. We have some weight guidelines to help you know which size should fit your little one.

  • To use the small rise setting, snap the rise snaps to the top of the three rows of snaps. This small size setting is used from approximately 8 to 16 pounds.
  • To use the medium rise setting, snap the rise snaps to the middle of the three rows of snaps. This medium size setting is used from approximately 17 to 22 pounds.
  • To use the large rise setting, unsnap the rise snaps to expose all three rows of snaps. This large size setting is used from approximately 23 to 40 pounds.

The one-size insert included with your bumGenius 4.0 or 5.0 cloth diapers also has three settings that correlate with your rise settings.

  • When using the smallest rise setting, snap the insert to the snap closest to the center of the insert before stuffing it into your pocket diaper.
  • For the medium rise setting, snap into the snap closest to the outer edge of the insert.
  • For the large rise setting, use the one-size insert fully unsnapped and flat inside the pocket of the diaper.
Sometimes there are signs that indicate that you need to adjust the rise. These can happen outside of the suggested weight guidelines.

If you are experiencing leaks, you may need to go down a rise setting. This sometimes happens once babies become mobile (i.e. learning to crawl or walk) and slim down a bit.

If you are adding several extra inserts or doublers to your pocket style diapers for nap time or overnight and are experiencing leaks only during these times, try going up a rise setting. Adding extra inserts to your pocket style diapers changes the fit of the diaper and sometimes the rise setting needs to be adjusted to allow for the extra bulk.

As your baby grows and changes, it is common to have to decrease your waist setting (especially for snaps) when you increase your rise setting to get a great fit.

The Cotton Babies customer service team is always glad to assist you in getting the right fit for your one-size cloth diapers on your little one. For a personalized fit troubleshooting session, please e-mail us at We’ll ask a few questions about your baby to give you personalized suggestions for your cloth diapers.


About the Author

Heather is mom to four, born within 40 months (single, twins, single). She writes transparently about her chaotic household to encourage others through the twists and turns of parenting.



  • Xi Rosewell said...
    September 27, 2012 at 5:35 am

    I love this kind of cloth diaper. You won’t have a problem when it comes to sizes because this can be adjusted. Just perfect enough for the babies.

  • Anonymous said...
    September 24, 2012 at 9:55 pm

    Thank you!

  • Anonymous said...
    September 21, 2012 at 6:18 pm

    We are right at that weight where we could switch from small to medium, so with our light absorbency inserts, I still set for small. We do need to use the medium with more fluff. A question I had: Does it matter if the rise snaps are undone for laundry? To me, it seems they should be unsnapped for cleaning, but then it is adding work (both to unsnap and snap again). So, what is the advice for laundering? Thanks!

    • Heather said...
      September 24, 2012 at 9:22 am

      You do not have to unsnap your rise setting for each wash, they should get clean as long as you remove the inserts.

  • baby diapers said...
    September 19, 2012 at 7:39 am

    Thanks for sharing this wonderful post with us..

  • Cindy Bennett said...
    September 18, 2012 at 11:46 am

    Thanks. I LOVE my bg 4.0. Although I am a lil concerned that they will not work for my daughter thru potty training. She was a whooping 11 lbs at birth and now 21 lbs at 6 months. So hopefully the work to 40 lbs. My son still isn’t 40 lbs and he’s almost 5 so there is my hope.(although he was 8 lbs at birth)

  • The Baker said...
    September 17, 2012 at 12:10 pm

    we currently are using the medium setting with the inserts not folded. It creates too much bulk on my skinny 17 month old. So far it is working great unless he is on my back in his carrier. Then he might get a gap at the legs.

    I love these diapers but have definitely have an issue with fit when it comes to a skinny baby…at least when all our diapers are snaps!