Thirsties Diaper Covers

Hook and Loop: to item ordering page button

Snaps: to item ordering page button

The size Large Thirsties Cover is the next size up from the Thirsties Duo Size 2 cover.

preemie newborn cover  thirsties cover snap grey

Please NOTE:  The new, taller hookand loop version is the only version available but some pictures still show the older, smaller version of hook and loop. We do need pictures on babies of the new version to replace these pictures. Email yours to to possibly see your baby on this page. 

preemie newborndiaper cover on 6 lb baby size preemie/newborn on a baby in the 6 pound range. Tiny baby? See our Preemie page.

iris snap 6 pounds 15 oz 1 week old 6 pounds 15 ounces, 1 week old in Iris snap size XS, over a newborn Workhorse diaper

newborn baby diaper duo 6 pound baby XSmall, 2 weeks old, about 6 pounds, over small flat birdseye diaper.

small over red edge prefold Size small cover over a medium red edge prefold with the front folded down, Snappi fastened, on a 4 month old 17 pound baby. Our chart below says small or novice prefolds for size small covers, but you can get the medium under it by folding down the extra length of the prefold to fit it in there.

billy buttons standing baby 9 mo 21 pounds 9 months old, 21 pounds in size medium hook and loop Thirsties cover over a Cloth-eez prefold (trifolded, placed into the center of the cover). Mom says, "I like this Thirsties Cover better than the snap, it seems to have a higher rise (therefore, more coverage!)"

kneeling baby medium showing current style of hook and loop closure

thirsties baby sittingMedium on 9 month old 16 pound baby. Plenty of room, comfy in all the many positions of baby.

thirstiesRoomy but works well. Medium on same 16 pound 9 month old. These wrap around the leg lower than Bummis Supers. The style and sizing are different.

What fits with what? Thirsties size changes are at different places than Bummis Supers. Thirsties run a bit larger, taller at waist and lower on the leg. That is, the change from small to medium in Bummis is around 15 pounds, but for Thirsties it's about 18 pounds. So here is a picture showing the prefolds in the covers. You can choose to size-up the prefolds but you'll need to smoosh down or fold down the extra length to fit them in. (See the arrows: XS with small yellow edge prefold, and medium with large brown edge prefold.) Many moms do that and like the bigger diapers in there to get more absorbency and to skip buying a size of diapers. The diapers come down a bit in rise when you fasten the prefold, making them easier to fit the larger diapers in the smaller covers. I prefer matching the prefold to the cover size so that they do not need folding down or smooshing down or tucking in (the combinations without the arrow pointing to them), but do what works for you. Either way works. Thirsties also fit over just about any fitted diaper.

thirsties with prefold diapers

 Size large is larger than the size 2 Thirsties Duo cover.

2 year old size large Size Large over an XLarge Workhorse diaper. This is one of the few covers that fits really well over the XL Workhorse. This child is 2 years old and 30 pounds. Old style aplix is shown and the bird print is no longer available, but the fit of the large cover is still the same as shown in this picture in the new colors..

Size Large Thirsties cover is the next size up from the Thirsties Duo size 2 cover.

Wonderful over Workhorse diapers.


large prefold Size Large cover shown with a size large brown edge prefold inside

large prefoldSize Large cover shown with a XL toddler green edge prefold. This is one of the few covers that you can really get XL toddler size prefold into easily.

Newborn/Preemie (hook and loop only) 4  to 10  pounds
XSmall 6  to 12  pounds
Small 12 to 18 pounds
Medium 18 to 28  pounds
Large 28 to 40  pounds

Thirsties Cover

Snap or Hook/Loop

Recommended size
Cloth-eez Prefold

(if bold, this is the best fit, but fit preferences vary a lot!)

Recommended size

Cloth-eez  Workhorse Fitted
NB/Preemie (H/L only)

Purple edge Preemie

Grey edge Newbie
Fitted diaper not recommended

Grey edge Newbie

Orange edge Newborn


Light green edge Novice

Orangeedge Newborn Small

Light green edge Novice

Yellow edge Small

Yellow edge Small

Red edge Medium Medium

Blue edge Intermediate

Red edge Medium

Red edge Medium

Brown edge Large Large

Brown edge Large

Dark Green edge Toddler XL (XL fits if diaper is fastened; too long if diaper is pad-folded but can be pushed down in to fit) Dark Green edge Toddler XL


Hook and Loop: to item ordering page button

Snaps: to item ordering page button

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